├── .gitignore ├── Finished sample ├── AbstractFactory │ ├── AbstractFactory.csproj │ ├── Implementation.cs │ └── Program.cs ├── Adapter │ ├── Adapter.csproj │ ├── ClassAdapterImplementation.cs │ ├── ObjectAdapterImplementation.cs │ ├── Program.cs │ └── Properties │ │ └── launchSettings.json ├── Bridge │ ├── Bridge.csproj │ ├── Implementation.cs │ └── Program.cs ├── Builder │ ├── Builder.csproj │ ├── Implementation.cs │ └── Program.cs ├── ChainOfResponsibility │ ├── ChainOfResponsibility.csproj │ ├── Implementation.cs │ └── Program.cs ├── Command │ ├── Command.csproj │ ├── Implementation.cs │ └── Program.cs ├── Composite │ ├── Composite.csproj │ ├── Implementation.cs │ └── Program.cs ├── Decorator │ ├── Decorator.csproj │ ├── Implementation.cs │ └── Program.cs ├── DesignPatterns.sln ├── Facade │ ├── Facade.csproj │ ├── Implementation.cs │ └── Program.cs ├── FactoryMethod │ ├── FactoryMethod.csproj │ ├── Implementation.cs │ └── Program.cs ├── Flyweight │ ├── Flyweight.csproj │ ├── Implementation.cs │ └── Program.cs ├── Interpreter │ ├── Implementation.cs │ ├── Interpreter.csproj │ └── Program.cs ├── Iterator │ ├── Implementation.cs │ ├── Iterator.csproj │ └── Program.cs ├── Mediator │ ├── Implementation.cs │ ├── Mediator.csproj │ └── Program.cs ├── Memento │ ├── Implementation.cs │ ├── Memento.csproj │ └── Program.cs ├── Observer │ ├── Implementation.cs │ ├── Observer.csproj │ └── Program.cs ├── Prototype │ ├── Implementation.cs │ ├── Program.cs │ └── Prototype.csproj ├── Proxy │ ├── Implementation.cs │ ├── Program.cs │ └── Proxy.csproj ├── Singleton │ ├── Implementation.cs │ ├── Program.cs │ └── Singleton.csproj ├── State │ ├── Implementation.cs │ ├── Program.cs │ └── State.csproj ├── Strategy │ ├── Implementation.cs │ ├── Program.cs │ └── Strategy.csproj ├── TemplateMethod │ ├── Implementation.cs │ ├── Program.cs │ └── TemplateMethod.csproj └── Visitor │ ├── Implementation.cs │ ├── Program.cs │ └── Visitor.csproj ├── README.md └── Starter solution ├── AbstractFactory ├── AbstractFactory.csproj ├── Implementation.cs └── Program.cs ├── Adapter ├── Adapter.csproj ├── Program.cs └── Properties │ └── launchSettings.json ├── Bridge ├── Bridge.csproj ├── Implementation.cs └── Program.cs ├── Builder ├── Builder.csproj ├── Implementation.cs └── Program.cs ├── ChainOfResponsibility ├── ChainOfResponsibility.csproj ├── Implementation.cs └── Program.cs ├── Command ├── Command.csproj ├── Implementation.cs └── Program.cs ├── Composite ├── Composite.csproj ├── Implementation.cs └── Program.cs ├── Decorator ├── Decorator.csproj ├── Implementation.cs └── Program.cs ├── DesignPatterns.sln ├── Facade ├── Facade.csproj ├── Implementation.cs └── Program.cs ├── FactoryMethod ├── FactoryMethod.csproj ├── Implementation.cs └── Program.cs ├── Flyweight ├── Flyweight.csproj ├── Implementation.cs └── Program.cs ├── Interpreter ├── Implementation.cs ├── Interpreter.csproj └── Program.cs ├── Iterator ├── Implementation.cs ├── Iterator.csproj └── Program.cs ├── Mediator ├── Implementation.cs ├── Mediator.csproj └── Program.cs ├── Memento ├── Implementation.cs ├── Memento.csproj └── Program.cs ├── Observer ├── Implementation.cs ├── Observer.csproj └── Program.cs ├── Prototype ├── Implementation.cs ├── Program.cs └── Prototype.csproj ├── Proxy ├── Implementation.cs ├── Program.cs └── Proxy.csproj ├── Singleton ├── Implementation.cs ├── Program.cs └── Singleton.csproj ├── State ├── Implementation.cs ├── Program.cs └── State.csproj ├── Strategy ├── Implementation.cs ├── Program.cs └── Strategy.csproj ├── TemplateMethod ├── Implementation.cs ├── Program.cs └── TemplateMethod.csproj └── Visitor ├── Implementation.cs ├── Program.cs └── Visitor.csproj /.gitignore: -------------------------------------------------------------------------------- 1 | ## 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2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Text; 5 | using System.Threading.Tasks; 6 | 7 | namespace AbstractFactory 8 | { 9 | /// 10 | /// AbstractFactory 11 | /// 12 | public interface IShoppingCartPurchaseFactory 13 | { 14 | IDiscountService CreateDiscountService(); 15 | IShippingCostsService CreateShippingCostsService(); 16 | } 17 | 18 | /// 19 | /// AbstractProduct 20 | /// 21 | public interface IDiscountService 22 | { 23 | int DiscountPercentage { get; } 24 | } 25 | 26 | /// 27 | /// ConcreteProduct 28 | /// 29 | public class BelgiumDiscountService : IDiscountService 30 | { 31 | public int DiscountPercentage => 20; 32 | } 33 | 34 | /// 35 | /// ConcreteProduct 36 | /// 37 | public class FranceDiscountService : IDiscountService 38 | { 39 | public int DiscountPercentage => 10; 40 | } 41 | 42 | /// 43 | /// AbstractProduct 44 | /// 45 | public interface IShippingCostsService 46 | { 47 | decimal ShippingCosts { get; } 48 | } 49 | 50 | /// 51 | /// ConcreteProduct 52 | /// 53 | public class BelgiumShippingCostsService : IShippingCostsService 54 | { 55 | public decimal ShippingCosts => 20; 56 | } 57 | 58 | /// 59 | /// ConcreteProduct 60 | /// 61 | public class FranceShippingCostsService : IShippingCostsService 62 | { 63 | public decimal ShippingCosts => 25; 64 | } 65 | 66 | 67 | public class BelgiumShoppingCartPurchaseFactory : IShoppingCartPurchaseFactory 68 | { 69 | public IDiscountService CreateDiscountService() 70 | { 71 | return new BelgiumDiscountService(); 72 | } 73 | 74 | public IShippingCostsService CreateShippingCostsService() 75 | { 76 | return new BelgiumShippingCostsService(); 77 | } 78 | } 79 | 80 | 81 | public class FranceShoppingCartPurchaseFactory : IShoppingCartPurchaseFactory 82 | { 83 | public IDiscountService CreateDiscountService() 84 | { 85 | return new FranceDiscountService(); 86 | } 87 | 88 | public IShippingCostsService CreateShippingCostsService() 89 | { 90 | return new FranceShippingCostsService(); 91 | } 92 | } 93 | 94 | 95 | /// 96 | /// Client class 97 | /// 98 | public class ShoppingCart 99 | { 100 | private readonly IDiscountService _discountService; 101 | private readonly IShippingCostsService _shippingCostsService; 102 | private int _orderCosts; 103 | 104 | // Constructor 105 | public ShoppingCart(IShoppingCartPurchaseFactory factory) 106 | { 107 | _discountService = factory.CreateDiscountService(); 108 | _shippingCostsService = factory.CreateShippingCostsService(); 109 | // assume that the total cost of all the items we ordered = 200 euro 110 | _orderCosts = 200; 111 | } 112 | 113 | public void CalculateCosts() 114 | { 115 | Console.WriteLine($"Total costs = {_orderCosts - (_orderCosts / 100 * _discountService.DiscountPercentage) + _shippingCostsService.ShippingCosts }"); 116 | } 117 | } 118 | } 119 | -------------------------------------------------------------------------------- /Finished sample/AbstractFactory/Program.cs: -------------------------------------------------------------------------------- 1 | using AbstractFactory; 2 | 3 | var belgiumShoppingCartPurchaseFactory = new BelgiumShoppingCartPurchaseFactory(); 4 | var shoppingCartForBelgium = new ShoppingCart(belgiumShoppingCartPurchaseFactory); 5 | shoppingCartForBelgium.CalculateCosts(); 6 | 7 | var franceShoppingCartPurchaseFactory = new FranceShoppingCartPurchaseFactory(); 8 | var shoppingCartForFrance = new ShoppingCart(franceShoppingCartPurchaseFactory); 9 | shoppingCartForFrance.CalculateCosts(); 10 | 11 | Console.ReadKey(); -------------------------------------------------------------------------------- /Finished sample/Adapter/Adapter.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Finished sample/Adapter/ClassAdapterImplementation.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Text; 5 | using System.Threading.Tasks; 6 | 7 | namespace Adapter.ClassAdapter 8 | { 9 | public class CityFromExternalSystem 10 | { 11 | public string Name { get; private set; } 12 | public string NickName { get; private set; } 13 | public int Inhabitants { get; private set; } 14 | 15 | public CityFromExternalSystem(string name, string nickName, int inhabitants) 16 | { 17 | Name = name; 18 | NickName = nickName; 19 | Inhabitants = inhabitants; 20 | } 21 | } 22 | 23 | /// 24 | /// Adaptee 25 | /// 26 | public class ExternalSystem 27 | { 28 | public CityFromExternalSystem GetCity() 29 | { 30 | return new CityFromExternalSystem("Antwerp", "'t Stad", 500000); 31 | } 32 | } 33 | 34 | public class City 35 | { 36 | public string FullName { get; private set; } 37 | public long Inhabitants { get; private set; } 38 | 39 | public City(string fullName, long inhabitants) 40 | { 41 | FullName = fullName; 42 | Inhabitants = inhabitants; 43 | } 44 | } 45 | 46 | /// 47 | /// Target 48 | /// 49 | public interface ICityAdapter 50 | { 51 | City GetCity(); 52 | } 53 | 54 | /// 55 | /// Adapter 56 | /// 57 | public class CityAdapter : ExternalSystem, ICityAdapter 58 | { 59 | public City GetCity() 60 | { 61 | // call into the external system 62 | var cityFromExternalSystem = base.GetCity(); 63 | 64 | // adapt the CityFromExternalCity to a City 65 | return new City( 66 | $"{cityFromExternalSystem.Name} - {cityFromExternalSystem.NickName}" 67 | , cityFromExternalSystem.Inhabitants); 68 | } 69 | } 70 | } 71 | -------------------------------------------------------------------------------- /Finished sample/Adapter/ObjectAdapterImplementation.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Text; 5 | using System.Threading.Tasks; 6 | 7 | namespace Adapter.ObjectAdapter 8 | { 9 | public class CityFromExternalSystem 10 | { 11 | public string Name { get; private set; } 12 | public string NickName { get; private set; } 13 | public int Inhabitants { get; private set; } 14 | 15 | public CityFromExternalSystem( 16 | string name, 17 | string nickName, 18 | int inhabitants) 19 | { 20 | Name = name; 21 | NickName = nickName; 22 | Inhabitants = inhabitants; 23 | } 24 | } 25 | 26 | /// 27 | /// Adaptee 28 | /// 29 | public class ExternalSystem 30 | { 31 | public CityFromExternalSystem GetCity() 32 | { 33 | return new CityFromExternalSystem("Antwerp", "'t Stad", 500000); 34 | } 35 | } 36 | 37 | public class City 38 | { 39 | public string FullName { get; private set; } 40 | public long Inhabitants { get; private set; } 41 | 42 | public City(string fullName, long inhabitants) 43 | { 44 | FullName = fullName; 45 | Inhabitants = inhabitants; 46 | } 47 | } 48 | 49 | /// 50 | /// Target 51 | /// 52 | public interface ICityAdapter 53 | { 54 | City GetCity(); 55 | } 56 | 57 | /// 58 | /// Adapter 59 | /// 60 | public class CityAdapter : ICityAdapter 61 | { 62 | public ExternalSystem ExternalSystem { get; private set; } = new(); 63 | 64 | public City GetCity() 65 | { 66 | // call into the external system 67 | var cityFromExternalSystem = ExternalSystem.GetCity(); 68 | 69 | // adapt the CityFromExternalCity to a City 70 | return new City( 71 | $"{cityFromExternalSystem.Name} - {cityFromExternalSystem.NickName}" 72 | , cityFromExternalSystem.Inhabitants); 73 | } 74 | } 75 | } 76 | -------------------------------------------------------------------------------- /Finished sample/Adapter/Program.cs: -------------------------------------------------------------------------------- 1 | using Adapter; 2 | using Adapter.ClassAdapter; 3 | 4 | // adapter example (same code for object & class adapter) 5 | ICityAdapter adapter = new CityAdapter(); 6 | var city = adapter.GetCity(); 7 | 8 | Console.WriteLine($"{city.FullName}, {city.Inhabitants}"); 9 | Console.ReadKey(); -------------------------------------------------------------------------------- /Finished sample/Adapter/Properties/launchSettings.json: -------------------------------------------------------------------------------- 1 | { 2 | "profiles": { 3 | "WSL": { 4 | "commandName": "WSL2", 5 | "distributionName": "" 6 | } 7 | } 8 | } -------------------------------------------------------------------------------- /Finished sample/Bridge/Bridge.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Finished sample/Bridge/Implementation.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Text; 5 | using System.Threading.Tasks; 6 | 7 | namespace Bridge 8 | { 9 | /// 10 | /// Abstraction 11 | /// 12 | public abstract class Menu 13 | { 14 | public readonly ICoupon _coupon; 15 | public abstract int CalculatePrice(); 16 | 17 | public Menu(ICoupon coupon) 18 | { 19 | _coupon = coupon; 20 | } 21 | } 22 | 23 | 24 | /// 25 | /// RefinedAbstraction 26 | /// 27 | public class VegetarianMenu : Menu 28 | { 29 | public VegetarianMenu(ICoupon coupon): base(coupon) 30 | { 31 | } 32 | public override int CalculatePrice() 33 | { 34 | return 20 - _coupon.CouponValue; 35 | } 36 | } 37 | 38 | /// 39 | /// RefinedAbstraction 40 | /// 41 | public class MeatBasedMenu : Menu 42 | { 43 | public MeatBasedMenu(ICoupon coupon) : base(coupon) 44 | { 45 | } 46 | public override int CalculatePrice() 47 | { 48 | return 30 - _coupon.CouponValue; 49 | } 50 | } 51 | 52 | 53 | /// 54 | /// Implementor 55 | /// 56 | public interface ICoupon 57 | { 58 | int CouponValue { get; } 59 | } 60 | 61 | 62 | /// 63 | /// ConcreteImplementor 64 | /// 65 | public class NoCoupon : ICoupon 66 | { 67 | public int CouponValue { get => 0; } 68 | } 69 | 70 | /// 71 | /// ConcreteImplementor 72 | /// 73 | public class OneEuroCoupon : ICoupon 74 | { 75 | public int CouponValue { get => 1; } 76 | } 77 | 78 | /// 79 | /// ConcreteImplementor 80 | /// 81 | public class TwoEuroCoupon : ICoupon 82 | { 83 | public int CouponValue { get => 2; } 84 | } 85 | } -------------------------------------------------------------------------------- /Finished sample/Bridge/Program.cs: -------------------------------------------------------------------------------- 1 | // create a menu implementation 2 | 3 | using Bridge; 4 | 5 | var noCoupon = new NoCoupon(); 6 | var oneEuroCoupon = new OneEuroCoupon(); 7 | 8 | var meatBasedMenu = new MeatBasedMenu(noCoupon); 9 | Console.WriteLine($"Meat based menu, no coupon: {meatBasedMenu.CalculatePrice()} euro."); 10 | 11 | meatBasedMenu = new MeatBasedMenu(oneEuroCoupon); 12 | Console.WriteLine($"Meat based menu, one euro coupon: {meatBasedMenu.CalculatePrice()} euro."); 13 | 14 | var vegetarianMenu = new VegetarianMenu(noCoupon); 15 | Console.WriteLine($"Vegetarian menu, no coupon: {vegetarianMenu.CalculatePrice()} euro."); 16 | 17 | vegetarianMenu = new VegetarianMenu(oneEuroCoupon); 18 | Console.WriteLine($"Vegetarian menu, one euro coupon: {vegetarianMenu.CalculatePrice()} euro."); 19 | 20 | Console.ReadKey(); -------------------------------------------------------------------------------- /Finished sample/Builder/Builder.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Finished sample/Builder/Implementation.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Text; 5 | using System.Threading.Tasks; 6 | 7 | namespace BuilderPattern 8 | { 9 | 10 | 11 | /// 12 | /// Director 13 | /// 14 | public class Garage 15 | { 16 | private CarBuilder? _builder; 17 | 18 | public Garage() 19 | { 20 | } 21 | 22 | public void Construct(CarBuilder builder) 23 | { 24 | _builder = builder; 25 | 26 | _builder.BuildEngine(); 27 | _builder.BuildFrame(); 28 | } 29 | 30 | // variation: the show method on the director instead of on the product. 31 | public void Show() 32 | { 33 | Console.WriteLine(_builder?.Car.ToString()); 34 | } 35 | } 36 | 37 | /// 38 | /// Builder abstract class 39 | /// 40 | public abstract class CarBuilder 41 | { 42 | public Car Car { get; private set; } 43 | 44 | public CarBuilder(string carType) 45 | { 46 | Car = new Car(carType); 47 | } 48 | public abstract void BuildEngine(); 49 | public abstract void BuildFrame(); 50 | } 51 | 52 | /// 53 | /// ConcreteBuilder1 class 54 | /// 55 | public class MiniBuilder : CarBuilder 56 | { 57 | public MiniBuilder() 58 | : base("Mini") 59 | { 60 | } 61 | 62 | public override void BuildEngine() 63 | { 64 | Car.AddPart("'not a V8'"); 65 | } 66 | 67 | public override void BuildFrame() 68 | { 69 | Car.AddPart("'3-door with stripes'"); 70 | } 71 | } 72 | 73 | /// 74 | /// ConcreteBuilder2 class 75 | /// 76 | public class BMWBuilder : CarBuilder 77 | { 78 | // Invoke base class constructor 79 | public BMWBuilder() 80 | : base("BMW") 81 | { 82 | } 83 | 84 | public override void BuildEngine() 85 | { 86 | Car.AddPart("'a fancy V8 engine'"); 87 | } 88 | 89 | public override void BuildFrame() 90 | { 91 | Car.AddPart("'5-door with metallic finish'"); 92 | } 93 | } 94 | 95 | 96 | /// 97 | /// Product class 98 | /// 99 | public class Car 100 | { 101 | private readonly List _parts = new(); 102 | private readonly string _carType; 103 | 104 | public Car(string carType) 105 | { 106 | _carType = carType; 107 | } 108 | 109 | public void AddPart(string part) 110 | { 111 | _parts.Add(part); 112 | } 113 | 114 | public override string ToString() 115 | { 116 | var sb = new StringBuilder(); 117 | foreach (string part in _parts) 118 | { 119 | sb.Append($"Car of type {_carType} has part {part}. "); 120 | } 121 | 122 | return sb.ToString(); 123 | } 124 | } 125 | 126 | 127 | 128 | /// 129 | /// The 'Director' class 130 | /// 131 | public class Director 132 | { 133 | // Builder uses a complex series of steps 134 | public void Construct(Builder builder) 135 | { 136 | builder.BuildPartA(); 137 | builder.BuildPartB(); 138 | } 139 | } 140 | 141 | /// 142 | /// The 'Builder' abstract class 143 | /// 144 | public abstract class Builder 145 | { 146 | public abstract void BuildPartA(); 147 | public abstract void BuildPartB(); 148 | public abstract Product GetResult(); 149 | } 150 | 151 | /// 152 | /// The 'ConcreteBuilder1' class 153 | /// 154 | public class ConcreteBuilder1 : Builder 155 | { 156 | private Product product = new Product(); 157 | 158 | public override void BuildPartA() 159 | { 160 | product.Add("PartA"); 161 | } 162 | 163 | public override void BuildPartB() 164 | { 165 | product.Add("PartB"); 166 | } 167 | 168 | public override Product GetResult() 169 | { 170 | return product; 171 | } 172 | } 173 | 174 | /// 175 | /// The 'ConcreteBuilder2' class 176 | /// 177 | public class ConcreteBuilder2 : Builder 178 | { 179 | private Product product = new Product(); 180 | 181 | public override void BuildPartA() 182 | { 183 | product.Add("PartX"); 184 | } 185 | 186 | public override void BuildPartB() 187 | { 188 | product.Add("PartY"); 189 | } 190 | 191 | public override Product GetResult() 192 | { 193 | return product; 194 | } 195 | } 196 | 197 | /// 198 | /// The 'Product' class 199 | /// 200 | public class Product 201 | { 202 | private List parts = new List(); 203 | 204 | public void Add(string part) 205 | { 206 | parts.Add(part); 207 | } 208 | 209 | public void Show() 210 | { 211 | Console.WriteLine("\nProduct Parts -------"); 212 | foreach (string part in parts) 213 | Console.WriteLine(part); 214 | } 215 | } 216 | } 217 | -------------------------------------------------------------------------------- /Finished sample/Builder/Program.cs: -------------------------------------------------------------------------------- 1 | using BuilderPattern; 2 | 3 | 4 | //Director director = new Director(); 5 | 6 | //Builder b1 = new ConcreteBuilder1(); 7 | //Builder b2 = new ConcreteBuilder2(); 8 | 9 | //// Construct two products 10 | //director.Construct(b1); 11 | //Product p1 = b1.GetResult(); 12 | //p1.Show(); 13 | 14 | //director.Construct(b2); 15 | //Product p2 = b2.GetResult(); 16 | //p2.Show(); 17 | 18 | 19 | 20 | 21 | var garage = new Garage(); 22 | 23 | var miniBuilder = new MiniBuilder(); 24 | var bmwBuilder = new BMWBuilder(); 25 | 26 | garage.Construct(miniBuilder); 27 | Console.WriteLine(miniBuilder.Car.ToString()); 28 | // or: 29 | garage.Show(); 30 | 31 | garage.Construct(bmwBuilder); 32 | Console.WriteLine(bmwBuilder.Car.ToString()); 33 | // or: 34 | garage.Show(); 35 | 36 | Console.ReadKey(); -------------------------------------------------------------------------------- /Finished sample/ChainOfResponsibility/ChainOfResponsibility.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Finished sample/ChainOfResponsibility/Implementation.cs: -------------------------------------------------------------------------------- 1 | using System.ComponentModel.DataAnnotations; 2 | 3 | namespace ChainOfResponsibility 4 | { 5 | public class Document 6 | { 7 | public string Title { get; set; } 8 | public DateTimeOffset LastModified { get; set; } 9 | public bool ApprovedByLitigation { get; set; } 10 | public bool ApprovedByManagement { get; set; } 11 | 12 | public Document( 13 | string title, 14 | DateTimeOffset lastModified, 15 | bool approvedByLitigation, 16 | bool approvedByManagement) 17 | { 18 | Title = title; 19 | LastModified = lastModified; 20 | ApprovedByLitigation = approvedByLitigation; 21 | ApprovedByManagement = approvedByManagement; 22 | } 23 | } 24 | 25 | /// 26 | /// Handler 27 | /// 28 | public interface IHandler where T : class 29 | { 30 | IHandler SetSuccessor(IHandler successor); 31 | void Handle(T request); 32 | } 33 | 34 | /// 35 | /// ConcreteHandler 36 | /// 37 | public class DocumentTitleHandler : IHandler 38 | { 39 | private IHandler? _successor; 40 | 41 | public void Handle(Document document) 42 | { 43 | if (document.Title == string.Empty) 44 | { 45 | // validation doesn't check out 46 | throw new ValidationException( 47 | new ValidationResult( 48 | "Title must be filled out", 49 | new List() { "Title" }), null, null); 50 | } 51 | 52 | // go to the next handler 53 | _successor?.Handle(document); 54 | } 55 | 56 | public IHandler SetSuccessor(IHandler successor) 57 | { 58 | _successor = successor; 59 | return successor; 60 | } 61 | } 62 | 63 | /// 64 | /// ConcreteHandler 65 | /// 66 | public class DocumentLastModifiedHandler : IHandler 67 | { 68 | private IHandler? _successor; 69 | 70 | public void Handle(Document document) 71 | { 72 | if (document.LastModified < DateTime.UtcNow.AddDays(-30)) 73 | { 74 | // validation doesn't check out 75 | throw new ValidationException( 76 | new ValidationResult( 77 | "Document must be modified in the last 30 days", 78 | new List() { "LastModified" }), null, null); 79 | } 80 | 81 | // go to the next handler 82 | _successor?.Handle(document); 83 | } 84 | 85 | public IHandler SetSuccessor(IHandler successor) 86 | { 87 | _successor = successor; 88 | return successor; 89 | } 90 | } 91 | 92 | /// 93 | /// ConcreteHandler 94 | /// 95 | public class DocumentApprovedByLitigationHandler : IHandler 96 | { 97 | private IHandler? _successor; 98 | 99 | public void Handle(Document document) 100 | { 101 | if (!document.ApprovedByLitigation) 102 | { 103 | // validation doesn't check out 104 | throw new ValidationException( 105 | new ValidationResult( 106 | "Document must be approved by litigation", 107 | new List() { "ApprovedByLitigation" }), null, null); 108 | } 109 | 110 | // go to the next handler 111 | _successor?.Handle(document); 112 | } 113 | 114 | public IHandler SetSuccessor(IHandler successor) 115 | { 116 | _successor = successor; 117 | return successor; 118 | } 119 | } 120 | 121 | /// 122 | /// ConcreteHandler 123 | /// 124 | public class DocumentApprovedByManagementHandler : IHandler 125 | { 126 | private IHandler? _successor; 127 | 128 | public void Handle(Document document) 129 | { 130 | if (!document.ApprovedByManagement) 131 | { 132 | // validation doesn't check out 133 | throw new ValidationException( 134 | new ValidationResult( 135 | "Document must be approved by management", 136 | new List() { "ApprovedByManagement" }), null, null); 137 | } 138 | 139 | // go to the next handler 140 | _successor?.Handle(document); 141 | } 142 | 143 | public IHandler SetSuccessor(IHandler successor) 144 | { 145 | _successor = successor; 146 | return successor; 147 | } 148 | } 149 | } -------------------------------------------------------------------------------- /Finished sample/ChainOfResponsibility/Program.cs: -------------------------------------------------------------------------------- 1 | using ChainOfResponsibility; 2 | using System.ComponentModel.DataAnnotations; 3 | 4 | var validDocument = new Document("How to Avoid Java Development", 5 | DateTimeOffset.UtcNow, true, true); 6 | var invalidDocument = new Document("How to Avoid Java Development", 7 | DateTimeOffset.UtcNow, false, true); 8 | 9 | // chain a set of handlers 10 | var documentHandlerChain = new DocumentTitleHandler(); 11 | documentHandlerChain 12 | .SetSuccessor(new DocumentLastModifiedHandler()) 13 | .SetSuccessor(new DocumentApprovedByLitigationHandler()) 14 | .SetSuccessor(new DocumentApprovedByManagementHandler()); 15 | 16 | try 17 | { 18 | documentHandlerChain.Handle(validDocument); 19 | Console.WriteLine("Valid document is valid."); 20 | documentHandlerChain.Handle(invalidDocument); 21 | Console.WriteLine("Invalid document is valid."); 22 | } 23 | catch (ValidationException validationException) 24 | { 25 | Console.WriteLine(validationException.Message); 26 | } -------------------------------------------------------------------------------- /Finished sample/Command/Command.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Finished sample/Command/Implementation.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Text; 5 | using System.Threading.Tasks; 6 | 7 | namespace Command 8 | { 9 | /// 10 | /// ICommand 11 | /// 12 | public interface ICommand 13 | { 14 | void Execute(); 15 | bool CanExecute(); 16 | void Undo(); 17 | } 18 | 19 | /// 20 | /// ConcreteCommand 21 | /// 22 | public class AddEmployeeToManagerList : ICommand 23 | { 24 | private readonly IEmployeeManagerRepository _employeeManagerRepository; 25 | private readonly int _managerId; 26 | private readonly Employee? _employee; 27 | 28 | public AddEmployeeToManagerList( 29 | IEmployeeManagerRepository employeeManagerRepository, 30 | int managerId, 31 | Employee? employee) 32 | { 33 | _employeeManagerRepository = employeeManagerRepository; 34 | _managerId = managerId; 35 | _employee = employee; 36 | } 37 | 38 | public bool CanExecute() 39 | { 40 | // potentially check against business/technical rules that might block execution 41 | 42 | // employee shouldn't be null 43 | if (_employee == null) 44 | { 45 | return false; 46 | } 47 | 48 | // employee shouldn't be on the manager's list already 49 | if (_employeeManagerRepository.HasEmployee(_managerId, _employee.Id)) 50 | { 51 | return false; 52 | } 53 | 54 | // other potential rule(s): ensure that an employee can only be added to 55 | // one manager's list at the same time, etc. 56 | return true; 57 | } 58 | 59 | public void Execute() 60 | { 61 | if (_employee == null) 62 | { 63 | return; 64 | } 65 | 66 | _employeeManagerRepository.AddEmployee(_managerId, _employee); 67 | } 68 | 69 | public void Undo() 70 | { 71 | if (_employee == null) 72 | { 73 | return; 74 | } 75 | 76 | _employeeManagerRepository.RemoveEmployee(_managerId, _employee); 77 | } 78 | } 79 | 80 | /// 81 | /// Invoker 82 | /// 83 | public class CommandManager 84 | { 85 | private readonly Stack _commands = new Stack(); 86 | 87 | public void Invoke(ICommand command) 88 | { 89 | if (command.CanExecute()) 90 | { 91 | command.Execute(); 92 | _commands.Push(command); 93 | } 94 | } 95 | 96 | public void Undo() 97 | { 98 | if (_commands.Any()) 99 | { 100 | _commands.Pop()?.Undo(); 101 | } 102 | } 103 | 104 | public void UndoAll() 105 | { 106 | while (_commands.Any()) 107 | { 108 | _commands.Pop()?.Undo(); 109 | } 110 | } 111 | } 112 | 113 | 114 | 115 | public class Employee 116 | { 117 | public int Id { get; set; } 118 | public string Name { get; set; } 119 | 120 | public Employee(int id, string name) 121 | { 122 | Id = id; 123 | Name = name; 124 | } 125 | } 126 | 127 | public class Manager : Employee 128 | { 129 | public List Employees = new(); 130 | public Manager(int id, string name) 131 | : base(id, name) 132 | { 133 | } 134 | } 135 | 136 | /// 137 | /// Receiver (interface) 138 | /// 139 | public interface IEmployeeManagerRepository 140 | { 141 | void AddEmployee(int managerId, Employee employee); 142 | void RemoveEmployee(int managerId, Employee employee); 143 | bool HasEmployee(int managerId, int employeeId); 144 | void WriteDataStore(); 145 | } 146 | 147 | /// 148 | /// Receiver (implementation) 149 | /// 150 | public class EmployeeManagerRepository : IEmployeeManagerRepository 151 | { 152 | // for demo purposes, use an in-memory datastore as a fake "manager list" 153 | private List _managers = new List() 154 | { new Manager(1, "Katie"), new Manager(2, "Geoff") }; 155 | 156 | public void AddEmployee(int managerId, Employee employee) 157 | { 158 | // in real-life, add additional input & error checks 159 | _managers.First(m => m.Id == managerId).Employees.Add(employee); 160 | } 161 | 162 | public void RemoveEmployee(int managerId, Employee employee) 163 | { 164 | // in real-life, add additional input & error checks 165 | _managers.First(m => m.Id == managerId).Employees.Remove(employee); 166 | } 167 | 168 | public bool HasEmployee(int managerId, int employeeId) 169 | { 170 | // in real-life, add additional input & error checks 171 | return _managers.First(m => m.Id == managerId).Employees.Any(e => e.Id == employeeId); 172 | } 173 | 174 | 175 | /// 176 | /// For demo purposes, write out the data store to the console window 177 | /// 178 | public void WriteDataStore() 179 | { 180 | foreach (var manager in _managers) 181 | { 182 | Console.WriteLine($"Manager {manager.Id}, {manager.Name}"); 183 | if (manager.Employees.Any()) 184 | { 185 | foreach (var employee in manager.Employees) 186 | { 187 | Console.WriteLine($"\t Employee {employee.Id}, {employee.Name}"); 188 | } 189 | } 190 | else 191 | { 192 | Console.WriteLine($"\t No employees."); 193 | } 194 | } 195 | Console.WriteLine(); 196 | } 197 | } 198 | } -------------------------------------------------------------------------------- /Finished sample/Command/Program.cs: -------------------------------------------------------------------------------- 1 | using Command; 2 | 3 | CommandManager commandManager = new (); 4 | IEmployeeManagerRepository repository = new EmployeeManagerRepository(); 5 | 6 | 7 | commandManager.Invoke(new AddEmployeeToManagerList(repository, 1, new Employee(111, "Kevin"))); 8 | repository.WriteDataStore(); 9 | 10 | commandManager.Undo(); 11 | repository.WriteDataStore(); 12 | 13 | commandManager.Invoke(new AddEmployeeToManagerList(repository, 1, new Employee(222, "Clara"))); 14 | repository.WriteDataStore(); 15 | 16 | commandManager.Invoke(new AddEmployeeToManagerList(repository, 2, new Employee(333, "Tom"))); 17 | repository.WriteDataStore(); 18 | 19 | // try adding the same employee again 20 | commandManager.Invoke(new AddEmployeeToManagerList(repository, 2, new Employee(333, "Tom"))); 21 | repository.WriteDataStore(); 22 | 23 | commandManager.UndoAll(); 24 | repository.WriteDataStore(); -------------------------------------------------------------------------------- /Finished sample/Composite/Composite.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Finished sample/Composite/Implementation.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Text; 5 | using System.Threading.Tasks; 6 | 7 | namespace Composite 8 | { 9 | /// 10 | /// Component 11 | /// 12 | public abstract class FileSystemItem 13 | { 14 | public string Name { get; set; } 15 | 16 | public abstract long GetSize(); 17 | 18 | public FileSystemItem(string name) 19 | { 20 | Name = name; 21 | } 22 | } 23 | 24 | 25 | /// 26 | /// Leaf 27 | /// 28 | public class File : FileSystemItem 29 | { 30 | private long _size; 31 | public File(string name, long size) : base(name) 32 | { 33 | _size = size; 34 | } 35 | 36 | public override long GetSize() 37 | { 38 | return _size; 39 | } 40 | } 41 | 42 | /// 43 | /// Composite 44 | /// 45 | public class Directory : FileSystemItem 46 | { 47 | private long _size; 48 | private List _fileSystemItems { get; set; } = new List(); 49 | 50 | public Directory(string name, long size) : base(name) 51 | { 52 | _size = size; 53 | } 54 | 55 | public void Add(FileSystemItem itemToAdd) 56 | { 57 | _fileSystemItems.Add(itemToAdd); 58 | } 59 | 60 | public void Remove(FileSystemItem itemToRemove) 61 | { 62 | _fileSystemItems.Remove(itemToRemove); 63 | } 64 | 65 | public override long GetSize() 66 | { 67 | var treeSize = _size; 68 | foreach (var fileSystemItem in _fileSystemItems) 69 | { 70 | treeSize += fileSystemItem.GetSize(); 71 | } 72 | return treeSize; 73 | } 74 | } 75 | 76 | 77 | } 78 | -------------------------------------------------------------------------------- /Finished sample/Composite/Program.cs: -------------------------------------------------------------------------------- 1 | var root = new Composite.Directory("root", 0); 2 | var topLevelFile = new Composite.File("toplevel.txt", 100); 3 | var topLevelDirectory1 = new Composite.Directory("topleveldirectory1", 4); 4 | var topLevelDirectory2 = new Composite.Directory("topleveldirectory2", 4); 5 | 6 | root.Add(topLevelFile); 7 | root.Add(topLevelDirectory1); 8 | root.Add(topLevelDirectory2); 9 | 10 | var subLevelFile1 = new Composite.File("sublevel1.txt", 200); 11 | var subLevelFile2 = new Composite.File("sublevel2.txt", 150); 12 | 13 | topLevelDirectory2.Add(subLevelFile1); 14 | topLevelDirectory2.Add(subLevelFile2); 15 | 16 | Console.WriteLine($"Size of topLevelDirectory1: {topLevelDirectory1.GetSize()}"); 17 | Console.WriteLine($"Size of topLevelDirectory2: {topLevelDirectory2.GetSize()}"); 18 | Console.WriteLine($"Size of root: {root.GetSize()}"); 19 | 20 | Console.ReadKey(); -------------------------------------------------------------------------------- /Finished sample/Decorator/Decorator.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Finished sample/Decorator/Implementation.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Text; 5 | using System.Threading.Tasks; 6 | 7 | namespace Decorator 8 | { 9 | /// 10 | /// ConcreteComponent1 11 | /// 12 | public class CloudMailService : IMailService 13 | { 14 | public bool SendMail(string message) 15 | { 16 | Console.WriteLine($"Message \"{message}\" sent via {nameof(CloudMailService)}."); 17 | return true; 18 | } 19 | } 20 | 21 | /// 22 | /// ConcreteComponent2 23 | /// 24 | public class OnPremiseMailService : IMailService 25 | { 26 | public bool SendMail(string message) 27 | { 28 | Console.WriteLine($"Message \"{message}\" sent via {nameof(OnPremiseMailService)}."); 29 | return true; 30 | } 31 | } 32 | 33 | /// 34 | /// Component (as interface) 35 | /// 36 | public interface IMailService 37 | { 38 | bool SendMail(string message); 39 | } 40 | 41 | 42 | /// 43 | /// Decorator (as abstract base class) 44 | /// 45 | public abstract class MailServiceDecoratorBase : IMailService 46 | { 47 | private readonly IMailService _mailService; 48 | public MailServiceDecoratorBase(IMailService mailService) 49 | { 50 | _mailService = mailService; 51 | } 52 | 53 | public virtual bool SendMail(string message) 54 | { 55 | return _mailService.SendMail(message); 56 | } 57 | } 58 | 59 | /// 60 | /// ConcreteDecorator1 61 | /// 62 | public class StatisticsDecorator : MailServiceDecoratorBase 63 | { 64 | public StatisticsDecorator(IMailService mailService) 65 | : base(mailService) 66 | { 67 | } 68 | 69 | public override bool SendMail(string message) 70 | { 71 | // Fake collecting statistics 72 | Console.WriteLine($"Collecting statistics in {nameof(StatisticsDecorator)}."); 73 | return base.SendMail(message); 74 | } 75 | } 76 | 77 | /// 78 | /// ConcreteDecorator2 79 | /// 80 | public class MessageDatabaseDecorator : MailServiceDecoratorBase 81 | { 82 | /// 83 | /// A list of sent messages - a "fake" database 84 | /// 85 | public List SentMessages { get; private set; } = new List(); 86 | 87 | public MessageDatabaseDecorator(IMailService mailService) 88 | : base(mailService) 89 | { 90 | } 91 | 92 | public override bool SendMail(string message) 93 | { 94 | if (base.SendMail(message)) 95 | { 96 | // store sent message 97 | SentMessages.Add(message); 98 | return true; 99 | }; 100 | 101 | return false; 102 | } 103 | } 104 | } 105 | -------------------------------------------------------------------------------- /Finished sample/Decorator/Program.cs: -------------------------------------------------------------------------------- 1 | // instantiate mail services 2 | using Decorator; 3 | 4 | var cloudMailService = new CloudMailService(); 5 | cloudMailService.SendMail("Hi there."); 6 | 7 | var onPremiseMailService = new OnPremiseMailService(); 8 | onPremiseMailService.SendMail("Hi there."); 9 | 10 | // add behavior 11 | var statisticsDecorator = new StatisticsDecorator(cloudMailService); 12 | statisticsDecorator.SendMail($"Hi there via {nameof(StatisticsDecorator)} wrapper."); 13 | 14 | // add behavior 15 | var messageDatabaseDecorator = new MessageDatabaseDecorator(onPremiseMailService); 16 | messageDatabaseDecorator.SendMail( 17 | $"Hi there via {nameof(MessageDatabaseDecorator)} wrapper, message 1."); 18 | messageDatabaseDecorator.SendMail( 19 | $"Hi there via {nameof(MessageDatabaseDecorator)} wrapper, message 2."); 20 | 21 | foreach (var message in messageDatabaseDecorator.SentMessages) 22 | { 23 | Console.WriteLine($"Stored message: \"{message}\""); 24 | } 25 | 26 | Console.ReadKey(); -------------------------------------------------------------------------------- /Finished sample/DesignPatterns.sln: -------------------------------------------------------------------------------- 1 |  2 | Microsoft Visual Studio Solution File, Format Version 12.00 3 | # Visual Studio Version 17 4 | VisualStudioVersion = 17.0.31903.59 5 | MinimumVisualStudioVersion = 10.0.40219.1 6 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "A - Creational", "A - Creational", "{B0F237CE-4C3B-467B-AB3F-7FED90583AB9}" 7 | EndProject 8 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "01 - Singleton", "01 - Singleton", "{482F9D07-99EE-4BF6-975F-295E89ECBCF9}" 9 | EndProject 10 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "02 - Factory Method", "02 - Factory Method", "{E8783E99-05CD-4F71-B166-0FC1B90FC2C2}" 11 | EndProject 12 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "03 - Abstract Factory", "03 - Abstract Factory", "{4763D927-A2E7-4322-8134-7D24DDD947F1}" 13 | EndProject 14 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FactoryMethod", "FactoryMethod\FactoryMethod.csproj", "{1CDF5F40-3F42-4339-9702-8BC7EA4D9DEE}" 15 | EndProject 16 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AbstractFactory", "AbstractFactory\AbstractFactory.csproj", "{51C54352-1897-4749-BD39-660613C2235B}" 17 | EndProject 18 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "04 -Builder", "04 -Builder", "{21752809-82A5-4212-8444-166F656129FC}" 19 | EndProject 20 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Builder", "Builder\Builder.csproj", "{8552B7D4-35B3-4916-8D5D-D0479802BA35}" 21 | EndProject 22 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "05 - Prototype", "05 - Prototype", "{E0164F8E-AB94-4D3F-879A-6DB5F19FE84B}" 23 | EndProject 24 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Prototype", "Prototype\Prototype.csproj", "{1C69FD15-5FD4-49AF-B31F-F2A3407364EC}" 25 | EndProject 26 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "B - Structural", "B - Structural", "{BA4514FF-AA9E-402C-B074-5A16FF91FD6E}" 27 | EndProject 28 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "06 - Adapter", "06 - Adapter", "{60637BBF-C1E5-47EF-9994-7870B51913A3}" 29 | EndProject 30 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Adapter", "Adapter\Adapter.csproj", "{4E31DC34-C2C1-45C4-BC2D-21AFF98BDEB5}" 31 | EndProject 32 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "07 - Bridge", "07 - Bridge", "{7A473B8C-26AF-4CAE-B3E5-E0F091F7F4D2}" 33 | EndProject 34 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Bridge", "Bridge\Bridge.csproj", "{75E6E304-74F2-4D88-8589-4366B1A7684D}" 35 | EndProject 36 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "08 - Decorator", "08 - Decorator", "{46719157-346D-4BCE-B34D-55D2B5F2E93A}" 37 | EndProject 38 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Decorator", "Decorator\Decorator.csproj", "{12768030-04EF-4B1D-A0E9-7C96F6B73DBE}" 39 | EndProject 40 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "09 - Composite", "09 - Composite", "{E262BBA8-94AE-495C-85E6-FA54BA6A90A2}" 41 | EndProject 42 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Composite", "Composite\Composite.csproj", "{898A0BFF-C8CA-451D-BA92-DACABABFF53E}" 43 | EndProject 44 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "10 - Facade", "10 - Facade", "{BA606C2E-5A34-4290-AC23-58E5482CD300}" 45 | EndProject 46 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Facade", "Facade\Facade.csproj", "{2F4804B4-98BC-4DF6-8362-E96AA344A29A}" 47 | EndProject 48 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "11 - Proxy", "11 - Proxy", "{59DA4BDF-CFF5-4F06-8878-67F7900F37D7}" 49 | EndProject 50 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Proxy", "Proxy\Proxy.csproj", "{3BDFB38E-00D4-434E-8985-5D6661931089}" 51 | EndProject 52 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "12 - Flyweight", "12 - Flyweight", "{449D2089-E1E9-4097-8996-5E6E3D80B24C}" 53 | EndProject 54 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Flyweight", "Flyweight\Flyweight.csproj", "{ACCB5262-A3F5-4A77-864F-F27A3A3B5259}" 55 | EndProject 56 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Singleton", "Singleton\Singleton.csproj", "{347B70DD-B108-4DB3-B36E-01DC8ADB9C2C}" 57 | EndProject 58 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "C - Behavioral", "C - Behavioral", "{EE357574-412D-4C9D-A167-5002DE164362}" 59 | EndProject 60 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "15 - Command", "15 - Command", "{7736AF2A-2B94-42FB-A793-5020973687C8}" 61 | EndProject 62 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Command", "Command\Command.csproj", "{BA3B3232-7FC9-43AF-9AFE-E4F5211B4F1D}" 63 | EndProject 64 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "16 - Memento", "16 - Memento", "{C5BDE3AF-1138-4E87-8810-611687FFA522}" 65 | EndProject 66 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Memento", "Memento\Memento.csproj", "{176C219A-5E5A-4710-B360-E09DBC80690D}" 67 | EndProject 68 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "20 - State", "20 - State", "{0CC41725-98B1-4F2E-ACB9-3A0F47F65E97}" 69 | EndProject 70 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "State", "State\State.csproj", "{9D29533E-7C7F-4B72-9331-81EA8A9957D7}" 71 | EndProject 72 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "14 - Strategy", "14 - Strategy", "{62068BDC-394F-4A1E-825B-C7DE137900BB}" 73 | EndProject 74 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Strategy", "Strategy\Strategy.csproj", "{6E87E3A0-ECDB-47DD-B9E8-D9E31A27D812}" 75 | EndProject 76 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "17 - Mediator", "17 - Mediator", "{F71B79ED-777C-4707-9D38-CF15A476C55B}" 77 | EndProject 78 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Mediator", "Mediator\Mediator.csproj", "{913A71BA-D3BC-41F1-BA44-888AB8658630}" 79 | EndProject 80 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "18 - Chain of Responsibility", "18 - Chain of Responsibility", "{71A327E1-BA13-466C-B1A6-FA4551E8A670}" 81 | EndProject 82 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ChainOfResponsibility", "ChainOfResponsibility\ChainOfResponsibility.csproj", "{8768B99D-DC81-4951-BA46-8F1D10631C69}" 83 | EndProject 84 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "19 - Observer", "19 - 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{7A473B8C-26AF-4CAE-B3E5-E0F091F7F4D2} 220 | {46719157-346D-4BCE-B34D-55D2B5F2E93A} = {BA4514FF-AA9E-402C-B074-5A16FF91FD6E} 221 | {12768030-04EF-4B1D-A0E9-7C96F6B73DBE} = {46719157-346D-4BCE-B34D-55D2B5F2E93A} 222 | {E262BBA8-94AE-495C-85E6-FA54BA6A90A2} = {BA4514FF-AA9E-402C-B074-5A16FF91FD6E} 223 | {898A0BFF-C8CA-451D-BA92-DACABABFF53E} = {E262BBA8-94AE-495C-85E6-FA54BA6A90A2} 224 | {BA606C2E-5A34-4290-AC23-58E5482CD300} = {BA4514FF-AA9E-402C-B074-5A16FF91FD6E} 225 | {2F4804B4-98BC-4DF6-8362-E96AA344A29A} = {BA606C2E-5A34-4290-AC23-58E5482CD300} 226 | {59DA4BDF-CFF5-4F06-8878-67F7900F37D7} = {BA4514FF-AA9E-402C-B074-5A16FF91FD6E} 227 | {3BDFB38E-00D4-434E-8985-5D6661931089} = {59DA4BDF-CFF5-4F06-8878-67F7900F37D7} 228 | {449D2089-E1E9-4097-8996-5E6E3D80B24C} = {BA4514FF-AA9E-402C-B074-5A16FF91FD6E} 229 | {ACCB5262-A3F5-4A77-864F-F27A3A3B5259} = {449D2089-E1E9-4097-8996-5E6E3D80B24C} 230 | {347B70DD-B108-4DB3-B36E-01DC8ADB9C2C} = {482F9D07-99EE-4BF6-975F-295E89ECBCF9} 231 | {7736AF2A-2B94-42FB-A793-5020973687C8} = {EE357574-412D-4C9D-A167-5002DE164362} 232 | {BA3B3232-7FC9-43AF-9AFE-E4F5211B4F1D} = {7736AF2A-2B94-42FB-A793-5020973687C8} 233 | {C5BDE3AF-1138-4E87-8810-611687FFA522} = {EE357574-412D-4C9D-A167-5002DE164362} 234 | {176C219A-5E5A-4710-B360-E09DBC80690D} = {C5BDE3AF-1138-4E87-8810-611687FFA522} 235 | {0CC41725-98B1-4F2E-ACB9-3A0F47F65E97} = {EE357574-412D-4C9D-A167-5002DE164362} 236 | {9D29533E-7C7F-4B72-9331-81EA8A9957D7} = {0CC41725-98B1-4F2E-ACB9-3A0F47F65E97} 237 | {62068BDC-394F-4A1E-825B-C7DE137900BB} = {EE357574-412D-4C9D-A167-5002DE164362} 238 | {6E87E3A0-ECDB-47DD-B9E8-D9E31A27D812} = {62068BDC-394F-4A1E-825B-C7DE137900BB} 239 | {F71B79ED-777C-4707-9D38-CF15A476C55B} = {EE357574-412D-4C9D-A167-5002DE164362} 240 | {913A71BA-D3BC-41F1-BA44-888AB8658630} = {F71B79ED-777C-4707-9D38-CF15A476C55B} 241 | {71A327E1-BA13-466C-B1A6-FA4551E8A670} = {EE357574-412D-4C9D-A167-5002DE164362} 242 | {8768B99D-DC81-4951-BA46-8F1D10631C69} = {71A327E1-BA13-466C-B1A6-FA4551E8A670} 243 | {162BE83E-9D99-494B-8464-BB0BEE0BCC81} = {EE357574-412D-4C9D-A167-5002DE164362} 244 | {8FA532ED-DB9D-47E7-AD53-31881953993A} = {162BE83E-9D99-494B-8464-BB0BEE0BCC81} 245 | {818D8FDD-1C97-48D8-AEEF-A7F193AA9187} = {EE357574-412D-4C9D-A167-5002DE164362} 246 | {D4FEF27B-1C98-495E-93EF-1AC36ED810AB} = {818D8FDD-1C97-48D8-AEEF-A7F193AA9187} 247 | {173BC868-E7AE-43AE-A05E-FD9BEEA980C7} = {EE357574-412D-4C9D-A167-5002DE164362} 248 | {E3A37190-E73D-4F91-A249-9B5D18CF83AF} = {173BC868-E7AE-43AE-A05E-FD9BEEA980C7} 249 | {1622583F-64EB-4F30-8D38-E897FF8FA140} = {EE357574-412D-4C9D-A167-5002DE164362} 250 | {97CB88F2-868A-457A-90EB-89F55B9CBBF4} = {1622583F-64EB-4F30-8D38-E897FF8FA140} 251 | {FBA7CDD7-9BF5-4272-9414-C9A4DB6D5BDB} = {EE357574-412D-4C9D-A167-5002DE164362} 252 | {39C0A16A-B9F1-444B-9D5D-F46BBB84F746} = {FBA7CDD7-9BF5-4272-9414-C9A4DB6D5BDB} 253 | EndGlobalSection 254 | GlobalSection(ExtensibilityGlobals) = postSolution 255 | SolutionGuid = {F84E1DA5-656F-4C72-9FBA-4A07AD3EE35E} 256 | EndGlobalSection 257 | EndGlobal 258 | -------------------------------------------------------------------------------- /Finished sample/Facade/Facade.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Finished sample/Facade/Implementation.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Text; 5 | using System.Threading.Tasks; 6 | 7 | namespace Facade 8 | { 9 | /// 10 | /// Facade 11 | /// 12 | public class DiscountFacade 13 | { 14 | private readonly OrderService _orderService = new (); 15 | private readonly CustomerDiscountBaseService _customerDiscountBaseService = new (); 16 | private readonly DayOfTheWeekFactorService _dayOfTheWeekFactorService = new (); 17 | 18 | public double CalculateDiscountPercentage(int customerId) 19 | { 20 | if (!_orderService.HasEnoughOrders(customerId)) 21 | { 22 | return 0; 23 | } 24 | 25 | return _customerDiscountBaseService.CalculateDiscountBase(customerId) 26 | * _dayOfTheWeekFactorService.CalculateDayOfTheWeekFactor(); 27 | } 28 | } 29 | 30 | /// 31 | /// Subsystem class 32 | /// 33 | public class OrderService 34 | { 35 | public bool HasEnoughOrders(int customerId) 36 | { 37 | // does the customer have enough orders? 38 | // fake calculation for demo purposes 39 | return (customerId > 5); 40 | } 41 | } 42 | 43 | /// 44 | /// Subsystem class 45 | /// 46 | public class CustomerDiscountBaseService 47 | { 48 | public double CalculateDiscountBase(int customerId) 49 | { 50 | // fake calculation for demo purposes 51 | return (customerId > 8) ? 10 : 20; 52 | } 53 | } 54 | 55 | 56 | /// 57 | /// Subsystem class 58 | /// 59 | public class DayOfTheWeekFactorService 60 | { 61 | public double CalculateDayOfTheWeekFactor() 62 | { 63 | // fake calculation for demo purposes 64 | switch (DateTime.UtcNow.DayOfWeek) 65 | { 66 | case DayOfWeek.Saturday: 67 | case DayOfWeek.Sunday: 68 | return 0.8; 69 | default: 70 | return 1.2; 71 | } 72 | } 73 | } 74 | 75 | } 76 | -------------------------------------------------------------------------------- /Finished sample/Facade/Program.cs: -------------------------------------------------------------------------------- 1 | using Facade; 2 | 3 | var facade = new DiscountFacade(); 4 | Console.WriteLine($"Discount percentage for customer with id 1: {facade.CalculateDiscountPercentage(1)}"); 5 | Console.WriteLine($"Discount percentage for customer with id 10: {facade.CalculateDiscountPercentage(10)}"); 6 | 7 | Console.ReadKey(); -------------------------------------------------------------------------------- /Finished sample/FactoryMethod/FactoryMethod.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Finished sample/FactoryMethod/Implementation.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Text; 5 | using System.Threading.Tasks; 6 | 7 | namespace FactoryMethod 8 | { 9 | /// 10 | /// Product 11 | /// 12 | public abstract class DiscountService 13 | { 14 | public abstract int DiscountPercentage { get; } 15 | 16 | public override string ToString() => GetType().Name; 17 | } 18 | 19 | /// 20 | /// ConcreteProduct 21 | /// 22 | public class CountryDiscountService : DiscountService 23 | { 24 | private readonly string _countryIdentifier; 25 | 26 | public CountryDiscountService(string countryIdentifier) 27 | { 28 | _countryIdentifier = countryIdentifier; 29 | } 30 | 31 | public override int DiscountPercentage 32 | { 33 | get 34 | { 35 | switch (_countryIdentifier) 36 | { 37 | // if you're from Belgium, you get a better discount :) 38 | case "BE": 39 | return 20; 40 | default: 41 | return 10; 42 | } 43 | } 44 | } 45 | } 46 | 47 | /// 48 | /// ConcreteProduct 49 | /// 50 | public class CodeDiscountService : DiscountService 51 | { 52 | private readonly Guid _code; 53 | 54 | public CodeDiscountService(Guid code) 55 | { 56 | _code = code; 57 | } 58 | 59 | public override int DiscountPercentage 60 | { 61 | // each code returns the same fixed percentage, but a code is only 62 | // valid once - include a check to so whether the code's been used before 63 | // ... 64 | get => 15; 65 | } 66 | } 67 | 68 | /// 69 | /// Creator 70 | /// 71 | public abstract class DiscountFactory 72 | { 73 | public abstract DiscountService CreateDiscountService(); 74 | } 75 | 76 | /// 77 | /// ConcretCreator 78 | /// 79 | public class CountryDiscountFactory : DiscountFactory 80 | { 81 | private readonly string _countryIdentifier; 82 | public CountryDiscountFactory(string countryIdentifier) 83 | { 84 | _countryIdentifier = countryIdentifier; 85 | } 86 | 87 | public override DiscountService CreateDiscountService() 88 | { 89 | return new CountryDiscountService(_countryIdentifier); 90 | } 91 | } 92 | 93 | /// 94 | /// ConcreteCreator 95 | /// 96 | public class CodeDiscountFactory : DiscountFactory 97 | { 98 | private readonly Guid _code; 99 | 100 | public CodeDiscountFactory(Guid code) 101 | { 102 | _code = code; 103 | } 104 | public override DiscountService CreateDiscountService() 105 | { 106 | return new CodeDiscountService(_code); 107 | } 108 | } 109 | } 110 | -------------------------------------------------------------------------------- /Finished sample/FactoryMethod/Program.cs: -------------------------------------------------------------------------------- 1 | using FactoryMethod; 2 | 3 | var factories = new List { 4 | new CodeDiscountFactory(Guid.NewGuid()), 5 | new CountryDiscountFactory("BE") }; 6 | 7 | foreach (var factory in factories) 8 | { 9 | var discountService = factory.CreateDiscountService(); 10 | Console.WriteLine($"Percentage {discountService.DiscountPercentage} coming from {discountService}"); 11 | } 12 | 13 | Console.ReadKey(); -------------------------------------------------------------------------------- /Finished sample/Flyweight/Flyweight.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Finished sample/Flyweight/Implementation.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Text; 5 | using System.Threading.Tasks; 6 | 7 | namespace Flyweight 8 | { 9 | /// 10 | /// Flyweight 11 | /// 12 | public interface ICharacter 13 | { 14 | void Draw(string fontFamily, int fontSize); 15 | } 16 | 17 | /// 18 | /// Concrete Flyweight 19 | /// 20 | public class CharacterA : ICharacter 21 | { 22 | private char _actualCharacter = 'a'; 23 | private string _fontFamily = string.Empty; 24 | private int _fontSize; 25 | 26 | public void Draw(string fontFamily, int fontSize) 27 | { 28 | _fontFamily = fontFamily; 29 | _fontSize = fontSize; 30 | Console.WriteLine($"Drawing {_actualCharacter}, {_fontFamily} {_fontSize}"); 31 | } 32 | } 33 | 34 | /// 35 | /// Concrete Flyweight 36 | /// 37 | public class CharacterB : ICharacter 38 | { 39 | private char _actualCharacter = 'b'; 40 | private string _fontFamily = string.Empty; 41 | private int _fontSize; 42 | 43 | public void Draw(string fontFamily, int fontSize) 44 | { 45 | _fontFamily = fontFamily; 46 | _fontSize = fontSize; 47 | Console.WriteLine($"Drawing {_actualCharacter}, {_fontFamily} {_fontSize}"); 48 | } 49 | } 50 | 51 | /// 52 | /// FlyweightFactory 53 | /// 54 | public class CharacterFactory 55 | { 56 | private readonly Dictionary _characters = new (); 57 | 58 | public ICharacter? GetCharacter(char characterIdentifier) 59 | { 60 | // Coes the character dictionary contain the one we need? 61 | if (_characters.ContainsKey(characterIdentifier)) 62 | { 63 | Console.WriteLine("Character reuse"); 64 | return _characters[characterIdentifier]; 65 | } 66 | 67 | // The character isn't in the dictionary. 68 | // Create it, store it, return it. 69 | Console.WriteLine("Character construction"); 70 | switch (characterIdentifier) 71 | { 72 | case 'a': 73 | _characters[characterIdentifier] = new CharacterA(); 74 | return _characters[characterIdentifier]; 75 | case 'b': 76 | _characters[characterIdentifier] = new CharacterB(); 77 | return _characters[characterIdentifier]; 78 | // and so on... 79 | } 80 | 81 | return null; 82 | } 83 | 84 | public ICharacter CreateParagraph(List characters, int location) 85 | { 86 | return new Paragraph(characters, location); 87 | } 88 | } 89 | 90 | /// 91 | /// Unshared Concrete Flyweight 92 | /// 93 | public class Paragraph : ICharacter 94 | { 95 | private int _location; 96 | private List _characters = new(); 97 | 98 | public Paragraph(List characters, int location) 99 | { 100 | _characters = characters; 101 | _location = location; 102 | } 103 | 104 | public void Draw(string fontFamily, int fontSize) 105 | { 106 | Console.WriteLine($"Drawing in paragraph at location {_location}"); 107 | foreach (var character in _characters) 108 | { 109 | character.Draw(fontFamily, fontSize); 110 | } 111 | } 112 | } 113 | } 114 | -------------------------------------------------------------------------------- /Finished sample/Flyweight/Program.cs: -------------------------------------------------------------------------------- 1 | using Flyweight; 2 | 3 | var aBunchOfCharacters = "abba"; 4 | 5 | var characterFactory = new CharacterFactory(); 6 | 7 | // Get the flyweight(s) 8 | var characterObject = characterFactory.GetCharacter(aBunchOfCharacters[0]); 9 | // Pass through extrinsic state 10 | characterObject?.Draw("Arial", 12); 11 | 12 | characterObject = characterFactory.GetCharacter(aBunchOfCharacters[1]); 13 | characterObject?.Draw("Trebuchet MS", 14); 14 | 15 | characterObject = characterFactory.GetCharacter(aBunchOfCharacters[2]); 16 | characterObject?.Draw("Times New Roman", 16); 17 | 18 | characterObject = characterFactory.GetCharacter(aBunchOfCharacters[3]); 19 | characterObject?.Draw("Comic Sans", 18); 20 | 21 | // create unshared concrete flyweight (paragraph) 22 | var paragraph = characterFactory.CreateParagraph( 23 | new List() { characterObject }, 1); 24 | 25 | // draw the paragraph 26 | paragraph.Draw("Lucinda", 12); 27 | 28 | Console.ReadKey(); -------------------------------------------------------------------------------- /Finished sample/Interpreter/Implementation.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Text; 5 | using System.Threading.Tasks; 6 | 7 | namespace Interpreter 8 | { 9 | /// 10 | /// Context 11 | /// 12 | public class RomanContext 13 | { 14 | public int Input { get; set; } 15 | public string Output { get; set; } = string.Empty; 16 | public RomanContext(int input) 17 | { 18 | Input = input; 19 | } 20 | } 21 | 22 | /// 23 | /// AbstractExpression 24 | /// 25 | public abstract class RomanExpression 26 | { 27 | public abstract void Interpret(RomanContext value); 28 | } 29 | 30 | // 9 = IX 31 | // 8 = VIII 32 | // 7 = VII 33 | // 6 = VI 34 | // 5 = V 35 | // 4 = IV 36 | // 3 = III 37 | // 2 = II 38 | // 1 = I 39 | 40 | // simplified - each combination is reachable with substraction and these 4: 41 | // 9 = IX 42 | // 5 = V 43 | // 4 = IV 44 | // 1 = I 45 | 46 | /// 47 | /// TerminalExpression 48 | /// 49 | public class RomanOneExpression : RomanExpression 50 | { 51 | public override void Interpret(RomanContext value) 52 | { 53 | while ((value.Input - 9) >= 0) 54 | { 55 | value.Output += "IX"; 56 | value.Input -= 9; 57 | } 58 | 59 | while ((value.Input - 5) >= 0) 60 | { 61 | value.Output += "V"; 62 | value.Input -= 5; 63 | } 64 | 65 | while ((value.Input - 4) >= 0) 66 | { 67 | value.Output += "IV"; 68 | value.Input -= 4; 69 | } 70 | 71 | while ((value.Input - 1) >= 0) 72 | { 73 | value.Output += "I"; 74 | value.Input -= 1; 75 | } 76 | } 77 | } 78 | 79 | // 90 = XC 80 | // 80 = LIII 81 | // 70 = LII 82 | // 60 = LX 83 | // 50 = L 84 | // 40 = XL 85 | // 30 = XXX 86 | // 20 = XX 87 | // 10 = X 88 | 89 | // simplified - each combination is reachable with substraction and these 4: 90 | // 90 = XC 91 | // 50 = L 92 | // 40 = XL 93 | // 10 = X 94 | 95 | /// 96 | /// TerminalExpression 97 | /// 98 | public class RomanTenExpression : RomanExpression 99 | { 100 | public override void Interpret(RomanContext value) 101 | { 102 | while ((value.Input - 90) >= 0) 103 | { 104 | value.Output += "XC"; 105 | value.Input -= 90; 106 | } 107 | 108 | while ((value.Input - 50) >= 0) 109 | { 110 | value.Output += "L"; 111 | value.Input -= 50; 112 | } 113 | 114 | while ((value.Input - 40) >= 0) 115 | { 116 | value.Output += "XL"; 117 | value.Input -= 40; 118 | } 119 | 120 | while ((value.Input - 10) >= 0) 121 | { 122 | value.Output += "X"; 123 | value.Input -= 10; 124 | } 125 | } 126 | } 127 | 128 | // 900 = CM 129 | // 800 = DCCC 130 | // 700 = DCC 131 | // 600 = DC 132 | // 500 = D 133 | // 400 = CD 134 | // 300 = CCC 135 | // 200 = CC 136 | // 100 = C 137 | 138 | // simplified - each combination is reachable with substraction and these 4: 139 | // 900 = CM 140 | // 500 = D 141 | // 400 = CD 142 | // 100 = C 143 | 144 | /// 145 | /// TerminalExpression 146 | /// 147 | public class RomanHunderdExpression : RomanExpression 148 | { 149 | public override void Interpret(RomanContext value) 150 | { 151 | while ((value.Input - 900) >= 0) 152 | { 153 | value.Output += "CM"; 154 | value.Input -= 900; 155 | } 156 | 157 | while ((value.Input - 500) >= 0) 158 | { 159 | value.Output += "D"; 160 | value.Input -= 500; 161 | } 162 | 163 | while ((value.Input - 400) >= 0) 164 | { 165 | value.Output += "CD"; 166 | value.Input -= 400; 167 | } 168 | 169 | while ((value.Input - 100) >= 0) 170 | { 171 | value.Output += "C"; 172 | value.Input -= 100; 173 | } 174 | } 175 | } 176 | } 177 | -------------------------------------------------------------------------------- /Finished sample/Interpreter/Interpreter.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Finished sample/Interpreter/Program.cs: -------------------------------------------------------------------------------- 1 | using Interpreter; 2 | 3 | var expressions = new List 4 | { 5 | new RomanHunderdExpression(), 6 | new RomanTenExpression(), 7 | new RomanOneExpression(), 8 | }; 9 | 10 | var context = new RomanContext(5); 11 | foreach (var expression in expressions) 12 | { 13 | expression.Interpret(context); 14 | } 15 | Console.WriteLine($"Translating Arabic numerals to Roman numerals: 5 = {context.Output}"); 16 | 17 | context = new RomanContext(81); 18 | foreach (var expression in expressions) 19 | { 20 | expression.Interpret(context); 21 | } 22 | Console.WriteLine($"Translating Arabic numerals to Roman numerals: 81 = {context.Output}"); 23 | 24 | context = new RomanContext(733); 25 | foreach (var expression in expressions) 26 | { 27 | expression.Interpret(context); 28 | } 29 | Console.WriteLine($"Translating Arabic numerals to Roman numerals: 733 = {context.Output}"); 30 | -------------------------------------------------------------------------------- /Finished sample/Iterator/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace Iterator 2 | { 3 | public class Person 4 | { 5 | public string Name { get; set; } 6 | public string Country { get; set; } 7 | 8 | public Person(string name, string country) 9 | { 10 | Name = name; 11 | Country = country; 12 | } 13 | } 14 | 15 | /// 16 | /// Iterator 17 | /// 18 | public interface IPeopleIterator 19 | { 20 | Person First(); 21 | Person Next(); 22 | bool IsDone { get; } 23 | Person CurrentItem { get; } 24 | } 25 | 26 | /// 27 | /// ConcreteIterator 28 | /// 29 | public class PeopleIterator : IPeopleIterator 30 | { 31 | private PeopleCollection _peopleCollection; 32 | private int _current = 0; 33 | 34 | public PeopleIterator(PeopleCollection collection) 35 | { 36 | _peopleCollection = collection; 37 | } 38 | 39 | public Person First() 40 | { 41 | _current = 0; 42 | return _peopleCollection 43 | .OrderBy(p => p.Name).ToList()[_current]; 44 | } 45 | 46 | public Person Next() 47 | { 48 | _current++; 49 | if (!IsDone) 50 | { 51 | return _peopleCollection 52 | .OrderBy(p => p.Name).ToList()[_current]; 53 | } 54 | else 55 | { 56 | return null; 57 | } 58 | } 59 | 60 | public bool IsDone 61 | { 62 | get { return _current >= _peopleCollection.Count; } 63 | } 64 | 65 | public Person CurrentItem 66 | { 67 | get { return _peopleCollection 68 | .OrderBy(p => p.Name).ToList()[_current]; } 69 | } 70 | } 71 | 72 | /// 73 | /// Aggregate 74 | /// 75 | public interface IPeopleCollection 76 | { 77 | IPeopleIterator CreateIterator(); 78 | } 79 | 80 | /// 81 | /// ConcreteAggregate 82 | /// 83 | public class PeopleCollection : List, IPeopleCollection 84 | { 85 | public IPeopleIterator CreateIterator() 86 | { 87 | return new PeopleIterator(this); 88 | } 89 | } 90 | } 91 | -------------------------------------------------------------------------------- /Finished sample/Iterator/Iterator.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Finished sample/Iterator/Program.cs: -------------------------------------------------------------------------------- 1 | using Iterator; 2 | 3 | // create the collection 4 | PeopleCollection people = new PeopleCollection(); 5 | people.Add(new Person("Kevin Dockx", "Belgium")); 6 | people.Add(new Person("Gill Cleeren", "Belgium")); 7 | people.Add(new Person("Roland Guijt", "The Netherlands")); 8 | people.Add(new Person("Thomas Claudius Huber", "Germany")); 9 | 10 | // create the interator 11 | var peopleIterator = people.CreateIterator(); 12 | 13 | // use the iterator to run through the people 14 | // in the collection; they should come out 15 | // in alphabetical order 16 | for (Person person = peopleIterator.First(); 17 | !peopleIterator.IsDone; 18 | person = peopleIterator.Next()) 19 | { 20 | Console.WriteLine(person?.Name); 21 | } 22 | -------------------------------------------------------------------------------- /Finished sample/Mediator/Implementation.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Text; 5 | using System.Threading.Tasks; 6 | 7 | namespace Mediator 8 | { 9 | /// 10 | /// Mediator 11 | /// 12 | public interface IChatRoom 13 | { 14 | void Register(TeamMember teamMember); 15 | void Send(string from, string message); 16 | void Send(string from, string to, string message); 17 | void SendTo(string from, string message) where T : TeamMember; 18 | } 19 | 20 | /// 21 | /// Colleague 22 | /// 23 | public abstract class TeamMember 24 | { 25 | public string Name { get; set; } 26 | 27 | private IChatRoom? _chatroom; 28 | 29 | public TeamMember(string name) 30 | { 31 | Name = name; 32 | } 33 | 34 | internal void SetChatroom(IChatRoom chatRoom) 35 | { 36 | _chatroom = chatRoom; 37 | } 38 | 39 | public void Send(string message) 40 | { 41 | _chatroom?.Send(Name, message); 42 | } 43 | 44 | public void Send(string to, string message) 45 | { 46 | _chatroom?.Send(Name, to, message); 47 | } 48 | 49 | public void SendTo(string message) where T : TeamMember 50 | { 51 | _chatroom?.SendTo(Name, message); 52 | } 53 | 54 | public virtual void Receive(string from, string message) 55 | { 56 | Console.WriteLine($"message from {from} to {Name}: {message}"); 57 | } 58 | } 59 | 60 | /// 61 | /// ConcreteColleague 62 | /// 63 | public class Lawyer : TeamMember 64 | { 65 | private List _teamMembersInChat = new(); 66 | 67 | public Lawyer(string name) : base(name) 68 | { 69 | } 70 | 71 | public override void Receive(string from, string message) 72 | { 73 | Console.Write($"{nameof(Lawyer)} {Name} received: "); 74 | base.Receive(from, message); 75 | } 76 | } 77 | 78 | 79 | /// 80 | /// ConcreteColleague 81 | /// 82 | public class AccountManager : TeamMember 83 | { 84 | public AccountManager(string name) : base(name) 85 | { 86 | } 87 | 88 | public override void Receive(string from, string message) 89 | { 90 | Console.Write($"{nameof(AccountManager)} {Name} received: "); 91 | base.Receive(from, message); 92 | } 93 | } 94 | 95 | 96 | /// 97 | /// ConcreteMediator 98 | /// 99 | public class TeamChatRoom : IChatRoom 100 | { 101 | private readonly Dictionary teamMembers = new(); 102 | 103 | public void Register(TeamMember teamMember) 104 | { 105 | teamMember.SetChatroom(this); 106 | if (!teamMembers.ContainsKey(teamMember.Name)) 107 | { 108 | teamMembers.Add(teamMember.Name, teamMember); 109 | } 110 | } 111 | 112 | public void Send(string from, string message) 113 | { 114 | foreach (var teamMember in teamMembers.Values) 115 | { 116 | teamMember.Receive(from, message); 117 | } 118 | } 119 | 120 | public void Send(string from, string to, string message) 121 | { 122 | var teamMember = teamMembers[to]; 123 | teamMember?.Receive(from, message); 124 | } 125 | 126 | public void SendTo(string from, string message) where T : TeamMember 127 | { 128 | foreach (var teamMember in teamMembers.Values.OfType()) 129 | { 130 | teamMember.Receive(from, message); 131 | } 132 | } 133 | } 134 | } 135 | -------------------------------------------------------------------------------- /Finished sample/Mediator/Mediator.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Finished sample/Mediator/Program.cs: -------------------------------------------------------------------------------- 1 | using Mediator; 2 | 3 | TeamChatRoom teamChatroom = new(); 4 | 5 | var sven = new Lawyer("Sven"); 6 | var kenneth = new Lawyer("Kenneth"); 7 | var ann = new AccountManager("Ann"); 8 | var john = new AccountManager("John"); 9 | var kylie = new AccountManager("Kylie"); 10 | 11 | teamChatroom.Register(sven); 12 | teamChatroom.Register(kenneth); 13 | teamChatroom.Register(ann); 14 | teamChatroom.Register(john); 15 | teamChatroom.Register(kylie); 16 | 17 | ann.Send("Hi everyone, can someone have a look at file ABC123? I need a compliance check."); 18 | sven.Send("On it!"); 19 | sven.Send("Ann", "Could you join me in a Teams call?"); 20 | sven.Send("Ann", "All good :)"); 21 | ann.SendTo("The file was approved!"); -------------------------------------------------------------------------------- /Finished sample/Memento/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace Memento 2 | { 3 | /// 4 | /// ICommand 5 | /// 6 | public interface ICommand 7 | { 8 | void Execute(); 9 | bool CanExecute(); 10 | void Undo(); 11 | } 12 | 13 | /// 14 | /// Memento 15 | /// 16 | public class AddEmployeeToManagerListMemento 17 | { 18 | public int ManagerId { get; private set; } 19 | public Employee? Employee { get; private set; } 20 | 21 | public AddEmployeeToManagerListMemento(int managerId, Employee? employee) 22 | { 23 | ManagerId = managerId; 24 | Employee = employee; 25 | } 26 | } 27 | 28 | /// 29 | /// ConcreteCommand 30 | /// 31 | public class AddEmployeeToManagerList : ICommand 32 | { 33 | private readonly IEmployeeManagerRepository _employeeManagerRepository; 34 | private int _managerId; 35 | private Employee? _employee; 36 | 37 | public AddEmployeeToManagerList( 38 | IEmployeeManagerRepository employeeManagerRepository, 39 | int managerId, 40 | Employee? employee) 41 | { 42 | _employeeManagerRepository = employeeManagerRepository; 43 | _managerId = managerId; 44 | _employee = employee; 45 | } 46 | 47 | public AddEmployeeToManagerListMemento CreateMemento() 48 | { 49 | return new AddEmployeeToManagerListMemento(_managerId, _employee); 50 | } 51 | 52 | public void RestoreMemento(AddEmployeeToManagerListMemento memento) 53 | { 54 | _managerId = memento.ManagerId; 55 | _employee = memento.Employee; 56 | } 57 | 58 | public bool CanExecute() 59 | { 60 | // potentially check against business/technical rules that might block execution 61 | 62 | // employee shouldn't be null 63 | if (_employee == null) 64 | { 65 | return false; 66 | } 67 | 68 | // employee shouldn't be on the manager's list already 69 | if (_employeeManagerRepository.HasEmployee(_managerId, _employee.Id)) 70 | { 71 | return false; 72 | } 73 | 74 | // other potential rule(s): ensure that an employee can only be added to 75 | // one manager's list at the same time, etc. 76 | return true; 77 | } 78 | 79 | public void Execute() 80 | { 81 | if (_employee == null) 82 | { 83 | return; 84 | } 85 | 86 | _employeeManagerRepository.AddEmployee(_managerId, _employee); 87 | } 88 | 89 | public void Undo() 90 | { 91 | if (_employee == null) 92 | { 93 | return; 94 | } 95 | 96 | _employeeManagerRepository.RemoveEmployee(_managerId, _employee); 97 | } 98 | } 99 | 100 | /// 101 | /// CareTaker (and Invoker from the Command pattern) 102 | /// 103 | public class CommandManager 104 | { 105 | private readonly Stack _mementos = new (); 106 | private AddEmployeeToManagerList? _command; 107 | 108 | public void Invoke(AddEmployeeToManagerList command) 109 | { 110 | // if the command has not been stored yet, store it - we will 111 | // reuse it instead of storing different instances 112 | 113 | if (_command == null) 114 | { 115 | _command = command; 116 | } 117 | 118 | if (command.CanExecute()) 119 | { 120 | command.Execute(); 121 | _mementos.Push(command.CreateMemento()); 122 | } 123 | } 124 | 125 | public void Undo() 126 | { 127 | if (_mementos.Any()) 128 | { 129 | _command?.RestoreMemento(_mementos.Pop()); 130 | _command?.Undo(); 131 | } 132 | } 133 | 134 | public void UndoAll() 135 | { 136 | while (_mementos.Any()) 137 | { 138 | _command?.RestoreMemento(_mementos.Pop()); 139 | _command?.Undo(); 140 | } 141 | } 142 | } 143 | 144 | 145 | 146 | public class Employee 147 | { 148 | public int Id { get; set; } 149 | public string Name { get; set; } 150 | 151 | public Employee(int id, string name) 152 | { 153 | Id = id; 154 | Name = name; 155 | } 156 | } 157 | 158 | public class Manager : Employee 159 | { 160 | public List Employees = new(); 161 | public Manager(int id, string name) 162 | : base(id, name) 163 | { 164 | } 165 | } 166 | 167 | /// 168 | /// Receiver (interface) 169 | /// 170 | public interface IEmployeeManagerRepository 171 | { 172 | void AddEmployee(int managerId, Employee employee); 173 | void RemoveEmployee(int managerId, Employee employee); 174 | bool HasEmployee(int managerId, int employeeId); 175 | void WriteDataStore(); 176 | } 177 | 178 | /// 179 | /// Receiver (implementation) 180 | /// 181 | public class EmployeeManagerRepository : IEmployeeManagerRepository 182 | { 183 | // for demo purposes, use an in-memory datastore as a fake "manager list" 184 | private List _managers = new List() 185 | { new Manager(1, "Katie"), new Manager(2, "Geoff") }; 186 | 187 | public void AddEmployee(int managerId, Employee employee) 188 | { 189 | // in real-life, add additional input & error checks 190 | _managers.First(m => m.Id == managerId).Employees.Add(employee); 191 | } 192 | 193 | public void RemoveEmployee(int managerId, Employee employee) 194 | { 195 | // in real-life, add additional input & error checks 196 | _managers.First(m => m.Id == managerId).Employees.Remove(employee); 197 | } 198 | 199 | public bool HasEmployee(int managerId, int employeeId) 200 | { 201 | // in real-life, add additional input & error checks 202 | return _managers.First(m => m.Id == managerId).Employees.Any(e => e.Id == employeeId); 203 | } 204 | 205 | 206 | /// 207 | /// For demo purposes, write out the data store to the console window 208 | /// 209 | public void WriteDataStore() 210 | { 211 | foreach (var manager in _managers) 212 | { 213 | Console.WriteLine($"Manager {manager.Id}, {manager.Name}"); 214 | if (manager.Employees.Any()) 215 | { 216 | foreach (var employee in manager.Employees) 217 | { 218 | Console.WriteLine($"\t Employee {employee.Id}, {employee.Name}"); 219 | } 220 | } 221 | else 222 | { 223 | Console.WriteLine($"\t No employees."); 224 | } 225 | } 226 | Console.WriteLine(); 227 | } 228 | } 229 | } -------------------------------------------------------------------------------- /Finished sample/Memento/Memento.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Finished sample/Memento/Program.cs: -------------------------------------------------------------------------------- 1 | using Memento; 2 | 3 | CommandManager commandManager = new(); 4 | IEmployeeManagerRepository repository = new EmployeeManagerRepository(); 5 | 6 | 7 | commandManager.Invoke(new AddEmployeeToManagerList(repository, 1, new Employee(111, "Kevin"))); 8 | repository.WriteDataStore(); 9 | 10 | commandManager.Undo(); 11 | repository.WriteDataStore(); 12 | 13 | commandManager.Invoke(new AddEmployeeToManagerList(repository, 1, new Employee(222, "Clara"))); 14 | repository.WriteDataStore(); 15 | 16 | commandManager.Invoke(new AddEmployeeToManagerList(repository, 2, new Employee(333, "Tom"))); 17 | repository.WriteDataStore(); 18 | 19 | // try adding the same employee again 20 | commandManager.Invoke(new AddEmployeeToManagerList(repository, 2, new Employee(333, "Tom"))); 21 | repository.WriteDataStore(); 22 | 23 | commandManager.UndoAll(); 24 | repository.WriteDataStore(); -------------------------------------------------------------------------------- /Finished sample/Observer/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace Observer 2 | { 3 | public class TicketChange 4 | { 5 | public int Amount { get; private set; } 6 | public int ArtistId { get; private set; } 7 | 8 | public TicketChange(int artistId, int amount) 9 | { 10 | ArtistId = artistId; 11 | Amount = amount; 12 | } 13 | } 14 | 15 | /// 16 | /// Subject 17 | /// 18 | public abstract class TicketChangeNotifier 19 | { 20 | private List _observers = new(); 21 | 22 | public void AddObserver(ITicketChangeListener observer) 23 | { 24 | _observers.Add(observer); 25 | } 26 | 27 | public void RemoveObserver(ITicketChangeListener observer) 28 | { 29 | _observers.Remove(observer); 30 | } 31 | 32 | public void Notify(TicketChange ticketChange) 33 | { 34 | foreach (var observer in _observers) 35 | { 36 | observer.ReceiveTicketChangeNotification(ticketChange); 37 | } 38 | } 39 | } 40 | 41 | /// 42 | /// ConcreteSubject 43 | /// 44 | public class OrderService : TicketChangeNotifier 45 | { 46 | public void CompleteTicketSale(int artistId, int amount) 47 | { 48 | // change local datastore. Datastore omitted in demo implementation. 49 | Console.WriteLine($"{nameof(OrderService)} is changing its state."); 50 | // notify observers 51 | Console.WriteLine($"{nameof(OrderService)} is notifying observers..."); 52 | Notify(new TicketChange(artistId, amount)); 53 | } 54 | } 55 | 56 | /// 57 | /// Observer 58 | /// 59 | public interface ITicketChangeListener 60 | { 61 | void ReceiveTicketChangeNotification(TicketChange ticketChange); 62 | } 63 | 64 | /// 65 | /// ConcreteObserver 66 | /// 67 | public class TicketResellerService : ITicketChangeListener 68 | { 69 | public void ReceiveTicketChangeNotification(TicketChange ticketChange) 70 | { 71 | // update local datastore (datastore omitted in demo implementation) 72 | Console.WriteLine($"{nameof(TicketResellerService)} notified " + 73 | $"of ticket change: artist {ticketChange.ArtistId}, amount {ticketChange.Amount}"); 74 | } 75 | } 76 | 77 | /// 78 | /// ConcreteObserver 79 | /// 80 | public class TicketStockService : ITicketChangeListener 81 | { 82 | public void ReceiveTicketChangeNotification(TicketChange ticketChange) 83 | { 84 | // update local datastore (datastore omitted in demo implementation) 85 | Console.WriteLine($"{nameof(TicketStockService)} notified " + 86 | $"of ticket change: artist {ticketChange.ArtistId}, amount {ticketChange.Amount}"); 87 | } 88 | } 89 | } 90 | -------------------------------------------------------------------------------- /Finished sample/Observer/Observer.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Finished sample/Observer/Program.cs: -------------------------------------------------------------------------------- 1 | using Observer; 2 | 3 | TicketStockService ticketStockService = new(); 4 | TicketResellerService ticketResellerService = new(); 5 | OrderService orderService = new(); 6 | 7 | // add two observers 8 | orderService.AddObserver(ticketStockService); 9 | orderService.AddObserver(ticketResellerService); 10 | 11 | // notify 12 | orderService.CompleteTicketSale(1, 2); 13 | 14 | // remove one observer 15 | orderService.RemoveObserver(ticketResellerService); 16 | 17 | // notify 18 | orderService.CompleteTicketSale(2, 4); 19 | -------------------------------------------------------------------------------- /Finished sample/Prototype/Implementation.cs: -------------------------------------------------------------------------------- 1 | using Newtonsoft.Json; 2 | using System; 3 | using System.Collections.Generic; 4 | using System.Linq; 5 | using System.Runtime.Serialization; 6 | using System.Runtime.Serialization.Formatters.Binary; 7 | using System.Threading.Tasks; 8 | 9 | namespace Prototype 10 | { 11 | /// 12 | /// Prototype abstract class 13 | /// 14 | public abstract class Person 15 | { 16 | public abstract string Name { get; set; } 17 | 18 | public abstract Person Clone(bool deepClone); 19 | 20 | } 21 | 22 | /// 23 | /// ConcretePrototype1 24 | /// 25 | public class Employee : Person 26 | { 27 | public Manager Manager { get; set; } 28 | public override string Name { get; set; } 29 | 30 | public Employee(string name, Manager manager) 31 | { 32 | Name = name; 33 | Manager = manager; 34 | } 35 | 36 | public override Person Clone(bool deepClone = false) 37 | { 38 | if (deepClone) 39 | { 40 | var settings = new JsonSerializerSettings { TypeNameHandling = TypeNameHandling.All }; 41 | var objectAsJson = JsonConvert.SerializeObject(this, typeof(Employee), settings); 42 | return JsonConvert.DeserializeObject(objectAsJson, settings); 43 | } 44 | 45 | 46 | return (Person)MemberwiseClone(); 47 | } 48 | } 49 | 50 | /// 51 | /// ConcretePrototype2 52 | /// 53 | public class Manager : Person 54 | { 55 | public override string Name { get; set; } 56 | 57 | public Manager(string name) 58 | { 59 | Name = name; 60 | } 61 | 62 | public override Person Clone(bool deepClone = false) 63 | { 64 | if (deepClone) 65 | { 66 | var settings = new JsonSerializerSettings { TypeNameHandling = TypeNameHandling.All }; 67 | var objectAsJson = JsonConvert.SerializeObject(this, typeof(Manager), settings); 68 | return JsonConvert.DeserializeObject(objectAsJson, settings); 69 | } 70 | 71 | return (Person)MemberwiseClone(); 72 | } 73 | } 74 | } 75 | -------------------------------------------------------------------------------- /Finished sample/Prototype/Program.cs: -------------------------------------------------------------------------------- 1 | using Prototype; 2 | 3 | var manager = new Manager("Cindy"); 4 | var managerClone = (Manager)manager.Clone(); 5 | Console.WriteLine($"Manager was cloned: {managerClone.Name}"); 6 | 7 | var employee = new Employee("Kevin", manager); 8 | var employeeClone = (Employee)employee.Clone(true); 9 | Console.WriteLine($"Employee was cloned: {employeeClone.Name}, with manager {employeeClone.Manager.Name}"); 10 | 11 | // change the manager name 12 | manager.Name = "Karen"; 13 | Console.WriteLine($"Employee was cloned: {employeeClone.Name}, with manager {employeeClone.Manager.Name}"); 14 | 15 | Console.ReadKey(); -------------------------------------------------------------------------------- /Finished sample/Prototype/Prototype.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | -------------------------------------------------------------------------------- /Finished sample/Proxy/Implementation.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Text; 5 | using System.Threading.Tasks; 6 | 7 | namespace Proxy 8 | { 9 | /// 10 | /// RealSubject 11 | /// 12 | public class Document : IDocument 13 | { 14 | public string? Title { get; private set; } 15 | public string? Content { get; private set; } 16 | public int AuthorId { get; private set; } 17 | public DateTimeOffset LastAccessed { get; private set; } 18 | private string _fileName; 19 | 20 | public Document(string fileName) 21 | { 22 | _fileName = fileName; 23 | LoadDocument(fileName); 24 | } 25 | 26 | private void LoadDocument(string fileName) 27 | { 28 | Console.WriteLine("Executing expensive action: loading a file from disk"); 29 | // fake loading... 30 | Thread.Sleep(1000); 31 | 32 | Title = "An expensive document"; 33 | Content = "Lots and lots of content"; 34 | AuthorId = 1; 35 | LastAccessed = DateTimeOffset.UtcNow; 36 | } 37 | 38 | public void DisplayDocument() 39 | { 40 | Console.WriteLine($"Title: {Title}, Content: {Content}"); 41 | } 42 | } 43 | 44 | /// 45 | /// Subject 46 | /// 47 | public interface IDocument 48 | { 49 | void DisplayDocument(); 50 | } 51 | 52 | /// 53 | /// Proxy 54 | /// 55 | public class DocumentProxy : IDocument 56 | { 57 | // avoid creating the document until we need it 58 | private Lazy _document; 59 | private string _fileName; 60 | 61 | public DocumentProxy(string fileName) 62 | { 63 | _fileName = fileName; 64 | _document = new Lazy(() => new Document(_fileName)); 65 | } 66 | 67 | public void DisplayDocument() 68 | { 69 | _document.Value.DisplayDocument(); 70 | } 71 | } 72 | 73 | public class ProtectedDocumentProxy : IDocument 74 | { 75 | private string _fileName; 76 | private string _userRole; 77 | private DocumentProxy _documentProxy; 78 | 79 | public ProtectedDocumentProxy(string fileName, 80 | string userRole) 81 | { 82 | _fileName = fileName; 83 | _userRole = userRole; 84 | _documentProxy = new DocumentProxy(_fileName); 85 | } 86 | 87 | public void DisplayDocument() 88 | { 89 | Console.WriteLine($"Entering DisplayDocument in {nameof(ProtectedDocumentProxy)}."); 90 | 91 | if (_userRole != "Viewer") 92 | { 93 | throw new UnauthorizedAccessException(); 94 | } 95 | 96 | _documentProxy.DisplayDocument(); 97 | 98 | Console.WriteLine($"Exiting DisplayDocument in {nameof(ProtectedDocumentProxy)}."); 99 | } 100 | } 101 | } 102 | -------------------------------------------------------------------------------- /Finished sample/Proxy/Program.cs: -------------------------------------------------------------------------------- 1 |  2 | // without proxy 3 | Console.WriteLine("Constructing document."); 4 | var myDocument = new Proxy.Document("MyDocument.pdf"); 5 | Console.WriteLine("Document constructed."); 6 | myDocument.DisplayDocument(); 7 | 8 | Console.WriteLine(); 9 | 10 | // with proxy 11 | Console.WriteLine("Constructing document proxy."); 12 | var myDocumentProxy = new Proxy.DocumentProxy("MyDocument.pdf"); 13 | Console.WriteLine("Document proxy constructed."); 14 | myDocumentProxy.DisplayDocument(); 15 | 16 | Console.WriteLine(); 17 | 18 | // with chained proxy 19 | Console.WriteLine("Constructing protected document proxy."); 20 | var myProtectedDocumentProxy = new Proxy.ProtectedDocumentProxy("MyDocument.pdf", "Viewer"); 21 | Console.WriteLine("Protected document proxy constructed."); 22 | myProtectedDocumentProxy.DisplayDocument(); 23 | 24 | Console.WriteLine(); 25 | 26 | // with chained proxy, no access 27 | Console.WriteLine("Constructing protected document proxy."); 28 | myProtectedDocumentProxy = new Proxy.ProtectedDocumentProxy("MyDocument.pdf", "AnotherRole"); 29 | Console.WriteLine("Protected document proxy constructed."); 30 | myProtectedDocumentProxy.DisplayDocument(); 31 | -------------------------------------------------------------------------------- /Finished sample/Proxy/Proxy.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Finished sample/Singleton/Implementation.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Text; 5 | using System.Threading.Tasks; 6 | 7 | namespace Singleton 8 | { 9 | /// 10 | /// Singleton 11 | /// 12 | public class Logger 13 | { 14 | //private static Logger? _instance; 15 | 16 | private static readonly Lazy _lazyLogger 17 | = new Lazy(() => new Logger()); 18 | 19 | /// 20 | /// Instance 21 | /// 22 | public static Logger Instance 23 | { 24 | get { return _lazyLogger.Value; } 25 | //get 26 | //{ 27 | // if (_instance == null) 28 | // { 29 | // _instance = new Logger(); 30 | // } 31 | // return _instance; 32 | //} 33 | } 34 | 35 | protected Logger() 36 | { 37 | } 38 | 39 | /// 40 | /// SingletonOperation 41 | /// 42 | public void Log(string message) 43 | { 44 | Console.WriteLine($"Message to log: {message}"); 45 | } 46 | } 47 | } 48 | -------------------------------------------------------------------------------- /Finished sample/Singleton/Program.cs: -------------------------------------------------------------------------------- 1 | using Singleton; 2 | 3 | // call the property getter twice 4 | var instance1 = Logger.Instance; 5 | var instance2 = Logger.Instance; 6 | 7 | if (instance1 == instance2 && instance2 == Logger.Instance) 8 | { 9 | Console.WriteLine("Instances are the same."); 10 | } 11 | 12 | instance1.Log($"Message from {nameof(instance1)}"); 13 | // or 14 | instance1.Log($"Message from {nameof(instance2)}"); 15 | // or 16 | Logger.Instance.Log($"Message from {nameof(Logger.Instance)}"); -------------------------------------------------------------------------------- /Finished sample/Singleton/Singleton.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Finished sample/State/Implementation.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Text; 5 | using System.Threading.Tasks; 6 | 7 | namespace State 8 | { 9 | /// 10 | /// State 11 | /// 12 | public abstract class BankAccountState 13 | { 14 | public BankAccount BankAccount { get; protected set; } = null!; 15 | public decimal Balance { get; protected set; } 16 | 17 | public abstract void Deposit(decimal amount); 18 | public abstract void Withdraw(decimal amount); 19 | } 20 | 21 | /// 22 | /// ConcreteState 23 | /// 24 | public class OverdrawnState : BankAccountState 25 | { 26 | public OverdrawnState(decimal balance, BankAccount bankAccount) 27 | { 28 | Balance = balance; 29 | BankAccount = bankAccount; 30 | } 31 | 32 | /// 33 | /// Handle a deposit 34 | /// 35 | public override void Deposit(decimal amount) 36 | { 37 | Console.WriteLine($"In {GetType()}, depositing {amount}"); 38 | Balance += amount; 39 | if (Balance >= 0) 40 | { 41 | // change state to regular 42 | BankAccount.BankAccountState = new RegularState(Balance, BankAccount); 43 | } 44 | } 45 | 46 | /// 47 | /// Handle withdrawing 48 | /// 49 | public override void Withdraw(decimal amount) 50 | { 51 | // cannot withdraw 52 | Console.WriteLine($"In {GetType()}, cannot withdraw, balance {Balance}"); 53 | } 54 | } 55 | 56 | /// 57 | /// ConcreteState 58 | /// 59 | public class RegularState : BankAccountState 60 | { 61 | public RegularState(decimal balance, BankAccount bankAccount) 62 | { 63 | Balance = balance; 64 | BankAccount = bankAccount; 65 | } 66 | 67 | /// 68 | /// Handle a deposit 69 | /// 70 | public override void Deposit(decimal amount) 71 | { 72 | Console.WriteLine($"In {GetType()}, depositing {amount}"); 73 | Balance += amount; 74 | if (Balance >= 1000) 75 | { 76 | // change state to gold 77 | BankAccount.BankAccountState = new GoldState(Balance, BankAccount); 78 | } 79 | } 80 | 81 | /// 82 | /// Handle withdrawing 83 | /// 84 | public override void Withdraw(decimal amount) 85 | { 86 | Console.WriteLine($"In {GetType()}, withdrawing {amount} from {Balance}"); 87 | // change state to overdrawn when withdrawing results in less than zero 88 | Balance -= amount; 89 | if (Balance < 0) 90 | { 91 | // change state to overdrawn 92 | BankAccount.BankAccountState = new OverdrawnState(Balance, BankAccount); 93 | } 94 | } 95 | } 96 | 97 | /// 98 | /// ConcreteState 99 | /// 100 | public class GoldState : BankAccountState 101 | { 102 | public GoldState(decimal balance, BankAccount bankAccount) 103 | { 104 | Balance = balance; 105 | BankAccount = bankAccount; 106 | } 107 | 108 | /// 109 | /// Handle a deposit 110 | /// 111 | public override void Deposit(decimal amount) 112 | { 113 | Console.WriteLine($"In {GetType()}, depositing {amount} + 10% bonus: {amount/10}"); 114 | Balance += amount + (amount/10); 115 | } 116 | 117 | /// 118 | /// Handle withdrawing 119 | /// 120 | public override void Withdraw(decimal amount) 121 | { 122 | Console.WriteLine($"In {GetType()}, withdrawing {amount} from {Balance}"); 123 | // change state to overdrawn when withdrawing results in less than zero 124 | Balance -= amount; 125 | if (Balance < 1000 && Balance >= 0) 126 | { 127 | // change state to regular 128 | BankAccount.BankAccountState = new RegularState(Balance, BankAccount); 129 | } 130 | else if (Balance < 0) 131 | { 132 | // change state to overdrawn 133 | BankAccount.BankAccountState = new OverdrawnState(Balance, BankAccount); 134 | } 135 | } 136 | } 137 | 138 | /// 139 | /// Context 140 | /// 141 | public class BankAccount 142 | { 143 | public BankAccountState BankAccountState { get; set; } 144 | public decimal Balance { get { return BankAccountState.Balance; } } 145 | 146 | public BankAccount() 147 | { 148 | BankAccountState = new RegularState(200, this); 149 | } 150 | 151 | /// 152 | /// Request a deposit 153 | /// 154 | public void Deposit(decimal amount) 155 | { 156 | // let the current state handle the deposit 157 | BankAccountState.Deposit(amount); 158 | } 159 | 160 | /// 161 | /// Request a withdrawal 162 | /// 163 | public void Withdraw(decimal amount) 164 | { 165 | // let the current state handle the withdrawel 166 | BankAccountState.Withdraw(amount); 167 | } 168 | } 169 | } 170 | -------------------------------------------------------------------------------- /Finished sample/State/Program.cs: -------------------------------------------------------------------------------- 1 | using State; 2 | 3 | BankAccount bankAccount = new(); 4 | bankAccount.Deposit(100); 5 | bankAccount.Withdraw(500); 6 | bankAccount.Withdraw(100); 7 | // deposit enough to go to gold 8 | bankAccount.Deposit(2000); 9 | // should be in gold now 10 | bankAccount.Deposit(100); 11 | // back to overdraw 12 | bankAccount.Withdraw(3000); 13 | // should transition to regular 14 | bankAccount.Deposit(3000); 15 | // should still be in regular 16 | bankAccount.Deposit(100); -------------------------------------------------------------------------------- /Finished sample/State/State.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Finished sample/Strategy/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace Strategy 2 | { 3 | /// 4 | /// Strategy 5 | /// 6 | public interface IExportService 7 | { 8 | void Export(Order order); 9 | } 10 | 11 | /// 12 | /// ConcreteStrategy 13 | /// 14 | public class JsonExportService : IExportService 15 | { 16 | public void Export(Order order) 17 | { 18 | Console.WriteLine($"Exporting {order.Name} to Json."); 19 | } 20 | } 21 | 22 | /// 23 | /// ConcreteStrategy 24 | /// 25 | public class XMLExportService : IExportService 26 | { 27 | public void Export(Order order) 28 | { 29 | Console.WriteLine($"Exporting {order.Name} to XML."); 30 | } 31 | } 32 | 33 | /// 34 | /// ConcreteStrategy 35 | /// 36 | public class CSVExportService : IExportService 37 | { 38 | public void Export(Order order) 39 | { 40 | Console.WriteLine($"Exporting {order.Name} to CSV."); 41 | } 42 | } 43 | 44 | /// 45 | /// Context 46 | /// 47 | public class Order 48 | { 49 | public string Customer { get; set; } 50 | public int Amount { get; set; } 51 | public string Name { get; set; } 52 | public string? Description { get; set; } 53 | 54 | public Order(string customer, int amount, string name) 55 | { 56 | Customer = customer; 57 | Amount = amount; 58 | Name = name; 59 | } 60 | 61 | public void Export(IExportService exportService) 62 | { 63 | if (exportService is null) 64 | { 65 | throw new ArgumentNullException(nameof(exportService)); 66 | } 67 | 68 | exportService.Export(this); 69 | } 70 | } 71 | } 72 | -------------------------------------------------------------------------------- /Finished sample/Strategy/Program.cs: -------------------------------------------------------------------------------- 1 | using Strategy; 2 | 3 | var order = new Order("Marvin Software", 5, "Visual Studio License"); 4 | order.Export(new CSVExportService()); 5 | order.Export(new JsonExportService()); -------------------------------------------------------------------------------- /Finished sample/Strategy/Strategy.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Finished sample/TemplateMethod/Implementation.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Text; 5 | using System.Threading.Tasks; 6 | 7 | namespace TemplateMethod 8 | { 9 | /// 10 | /// AbstractClass 11 | /// 12 | public abstract class MailParser 13 | { 14 | public virtual void FindServer() 15 | { 16 | Console.WriteLine("Finding server..."); 17 | } 18 | 19 | public abstract void AuthenticateToServer(); 20 | 21 | 22 | public virtual string ParseHtmlMailBody(string identifier) 23 | { 24 | Console.WriteLine("Parsing HTML mail body..."); 25 | return $"This is the body of mail with id {identifier}"; 26 | } 27 | 28 | /// 29 | /// Template method 30 | /// 31 | public string ParseMailBody(string identifier) 32 | { 33 | Console.WriteLine("Parsing mail body (in template method)..."); 34 | FindServer(); 35 | AuthenticateToServer(); 36 | return ParseHtmlMailBody(identifier); 37 | } 38 | } 39 | 40 | public class ExchangeMailParser : MailParser 41 | { 42 | public override void AuthenticateToServer() 43 | { 44 | Console.WriteLine("Connecting to Exchange"); 45 | } 46 | } 47 | 48 | public class ApacheMailParser : MailParser 49 | { 50 | public override void AuthenticateToServer() 51 | { 52 | Console.WriteLine("Connecting to Apache"); 53 | } 54 | } 55 | 56 | public class EudoraMailParser : MailParser 57 | { 58 | public override void FindServer() 59 | { 60 | Console.WriteLine("Finding Eudora server through a custom algorithm..."); 61 | } 62 | public override void AuthenticateToServer() 63 | { 64 | Console.WriteLine("Connecting to Eudora"); 65 | } 66 | } 67 | } 68 | -------------------------------------------------------------------------------- /Finished sample/TemplateMethod/Program.cs: -------------------------------------------------------------------------------- 1 | using TemplateMethod; 2 | 3 | ExchangeMailParser exchangeMailParser = new(); 4 | Console.WriteLine(exchangeMailParser.ParseMailBody("bf3a298c-9990-4b02-873d-3d3c98ad16d2")); 5 | Console.WriteLine(); 6 | 7 | ApacheMailParser apacheMailParser = new(); 8 | Console.WriteLine(apacheMailParser.ParseMailBody("07b8a8c7-c598-4b6c-9049-ecce9fe4a56b")); 9 | Console.WriteLine(); 10 | 11 | EudoraMailParser eudoraMailParser = new(); 12 | Console.WriteLine(eudoraMailParser.ParseMailBody("789fe935-ced2-4fbd-865b-172909560a93")); -------------------------------------------------------------------------------- /Finished sample/TemplateMethod/TemplateMethod.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Finished sample/Visitor/Implementation.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Text; 5 | using System.Threading.Tasks; 6 | 7 | namespace Visitor 8 | { 9 | ///// 10 | ///// Visitor 11 | ///// 12 | //public interface IVisitor 13 | //{ 14 | // void VisitCustomer(Customer customer); 15 | // void VisitEmployee(Employee employee); 16 | //} 17 | 18 | /// 19 | /// Visitor (alternative) 20 | /// 21 | public interface IVisitor 22 | { 23 | void Visit(IElement element); 24 | } 25 | 26 | /// 27 | /// Element 28 | /// 29 | public interface IElement 30 | { 31 | void Accept(IVisitor visitor); 32 | } 33 | 34 | /// 35 | /// ConcreteElement 36 | /// 37 | public class Customer : IElement 38 | { 39 | public decimal AmountOrdered { get; private set; } 40 | public decimal Discount { get; set; } 41 | public string Name { get; private set; } 42 | 43 | public Customer(string name, decimal amountOrdered) 44 | { 45 | Name = name; 46 | AmountOrdered = amountOrdered; 47 | } 48 | 49 | public void Accept(IVisitor visitor) 50 | { 51 | // alternative 52 | // visitor.VisitCustomer(this); 53 | visitor.Visit(this); 54 | Console.WriteLine($"Visited {nameof(Customer)} {Name}, discount given: {Discount}"); 55 | } 56 | } 57 | 58 | /// 59 | /// ConcreteElement 60 | /// 61 | public class Employee : IElement 62 | { 63 | public int YearsEmployed { get; private set; } 64 | public decimal Discount { get; set; } 65 | public string Name { get; private set; } 66 | 67 | public Employee(string name, int yearsEmployed) 68 | { 69 | Name = name; 70 | YearsEmployed = yearsEmployed; 71 | } 72 | 73 | public void Accept(IVisitor visitor) 74 | { 75 | // alternative 76 | // visitor.VisitEmployee(this); 77 | visitor.Visit(this); 78 | Console.WriteLine($"Visited {nameof(Employee)} {Name}, discount given: {Discount}"); 79 | } 80 | } 81 | 82 | ///// 83 | ///// ConcreteVisitor 84 | ///// 85 | //public class DiscountVisitor : IVisitor 86 | //{ 87 | // public decimal TotalDiscountGiven { get; set; } 88 | 89 | // public void VisitCustomer(Customer customer) 90 | // { 91 | // // percentage of total amount 92 | // var discount = customer.AmountOrdered / 10; 93 | // // set it on the customer 94 | // customer.Discount = discount; 95 | // // add it to the total amount 96 | // TotalDiscountGiven += discount; 97 | // } 98 | 99 | // public void VisitEmployee(Employee employee) 100 | // { 101 | // // fixed value depending on the amount of years employed 102 | // var discount = employee.YearsEmployed < 10 ? 100 : 200; 103 | // // set it on the employee 104 | // employee.Discount = discount; 105 | // // add it to the total amount 106 | // TotalDiscountGiven += discount; 107 | // } 108 | //} 109 | 110 | /// 111 | /// ConcreteVisitor (alternative) 112 | /// 113 | public class DiscountVisitor : IVisitor 114 | { 115 | public decimal TotalDiscountGiven { get; set; } 116 | 117 | public void Visit(IElement element) 118 | { 119 | if (element is Customer) 120 | { 121 | VisitCustomer((Customer)element); 122 | } 123 | else if (element is Employee) 124 | { 125 | VisitEmployee((Employee)element); 126 | } 127 | } 128 | 129 | private void VisitCustomer(Customer customer) 130 | { 131 | // percentage of total amount 132 | var discount = customer.AmountOrdered / 10; 133 | // set it on the customer 134 | customer.Discount = discount; 135 | // add it to the total amount 136 | TotalDiscountGiven += discount; 137 | } 138 | 139 | private void VisitEmployee(Employee employee) 140 | { 141 | // fixed value depending on the amount of years employed 142 | var discount = employee.YearsEmployed < 10 ? 100 : 200; 143 | // set it on the employee 144 | employee.Discount = discount; 145 | // add it to the total amount 146 | TotalDiscountGiven += discount; 147 | } 148 | } 149 | 150 | /// 151 | /// ObjectStructure 152 | /// 153 | public class Container 154 | { 155 | public List Employees { get; set; } = new(); 156 | public List Customers { get; set; } = new(); 157 | 158 | public void Accept(IVisitor visitor) 159 | { 160 | foreach (var employee in Employees) 161 | { 162 | employee.Accept(visitor); 163 | } 164 | foreach (var customer in Customers) 165 | { 166 | customer.Accept(visitor); 167 | } 168 | } 169 | } 170 | } 171 | -------------------------------------------------------------------------------- /Finished sample/Visitor/Program.cs: -------------------------------------------------------------------------------- 1 | using Visitor; 2 | 3 | // create container & add conrete elements 4 | var container = new Container(); 5 | container.Customers.Add(new Customer("Sophie", 500)); 6 | container.Customers.Add(new Customer("Karen", 1000)); 7 | container.Customers.Add(new Customer("Sven", 800)); 8 | container.Employees.Add(new Employee("Kevin", 18)); 9 | container.Employees.Add(new Employee("Tom", 5)); 10 | 11 | // create visitor 12 | DiscountVisitor discountVisitor = new(); 13 | 14 | // pass it through 15 | container.Accept(discountVisitor); 16 | 17 | // write out gathered amount 18 | Console.WriteLine($"Total discount: {discountVisitor.TotalDiscountGiven}"); -------------------------------------------------------------------------------- /Finished sample/Visitor/Visitor.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # C#10 Design Patterns 2 | Fully functioning sample code for my C#10 Design Patterns course over at Pluralsight. The samples cover all 23 Gang of Four design patterns, with a real-life example for each pattern. 3 | -------------------------------------------------------------------------------- /Starter solution/AbstractFactory/AbstractFactory.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Starter solution/AbstractFactory/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace AbstractFactory 2 | { 3 | 4 | } 5 | -------------------------------------------------------------------------------- /Starter solution/AbstractFactory/Program.cs: -------------------------------------------------------------------------------- 1 | Console.Title = "Abstract Factory"; -------------------------------------------------------------------------------- /Starter solution/Adapter/Adapter.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Starter solution/Adapter/Program.cs: -------------------------------------------------------------------------------- 1 | Console.Title = "Adapter"; -------------------------------------------------------------------------------- /Starter solution/Adapter/Properties/launchSettings.json: -------------------------------------------------------------------------------- 1 | { 2 | "profiles": { 3 | "WSL": { 4 | "commandName": "WSL2", 5 | "distributionName": "" 6 | } 7 | } 8 | } -------------------------------------------------------------------------------- /Starter solution/Bridge/Bridge.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Starter solution/Bridge/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace Bridge 2 | { 3 | } -------------------------------------------------------------------------------- /Starter solution/Bridge/Program.cs: -------------------------------------------------------------------------------- 1 | Console.Title = "Bridge"; -------------------------------------------------------------------------------- /Starter solution/Builder/Builder.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Starter solution/Builder/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace BuilderPattern 2 | { 3 | 4 | } 5 | -------------------------------------------------------------------------------- /Starter solution/Builder/Program.cs: -------------------------------------------------------------------------------- 1 | Console.Title = "Builder"; -------------------------------------------------------------------------------- /Starter solution/ChainOfResponsibility/ChainOfResponsibility.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Starter solution/ChainOfResponsibility/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace ChainOfResponsibility 2 | { 3 | } -------------------------------------------------------------------------------- /Starter solution/ChainOfResponsibility/Program.cs: -------------------------------------------------------------------------------- 1 | Console.Title = "Chain of Responsibility"; -------------------------------------------------------------------------------- /Starter solution/Command/Command.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Starter solution/Command/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace Command 2 | { 3 | } -------------------------------------------------------------------------------- /Starter solution/Command/Program.cs: -------------------------------------------------------------------------------- 1 | Console.Title = "Command"; -------------------------------------------------------------------------------- /Starter solution/Composite/Composite.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Starter solution/Composite/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace Composite 2 | { 3 | } 4 | -------------------------------------------------------------------------------- /Starter solution/Composite/Program.cs: -------------------------------------------------------------------------------- 1 | Console.Title = "Composite"; -------------------------------------------------------------------------------- /Starter solution/Decorator/Decorator.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Starter solution/Decorator/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace Decorator 2 | { 3 | } 4 | -------------------------------------------------------------------------------- /Starter solution/Decorator/Program.cs: -------------------------------------------------------------------------------- 1 | Console.Title = "Decorator"; -------------------------------------------------------------------------------- /Starter solution/DesignPatterns.sln: -------------------------------------------------------------------------------- 1 |  2 | Microsoft Visual Studio Solution File, Format Version 12.00 3 | # Visual Studio Version 17 4 | VisualStudioVersion = 17.0.31903.59 5 | MinimumVisualStudioVersion = 10.0.40219.1 6 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "A - Creational", "A - Creational", "{B0F237CE-4C3B-467B-AB3F-7FED90583AB9}" 7 | EndProject 8 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "01 - Singleton", "01 - Singleton", "{482F9D07-99EE-4BF6-975F-295E89ECBCF9}" 9 | EndProject 10 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "02 - Factory Method", "02 - Factory Method", "{E8783E99-05CD-4F71-B166-0FC1B90FC2C2}" 11 | EndProject 12 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "03 - Abstract Factory", "03 - Abstract Factory", "{4763D927-A2E7-4322-8134-7D24DDD947F1}" 13 | EndProject 14 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FactoryMethod", "FactoryMethod\FactoryMethod.csproj", "{1CDF5F40-3F42-4339-9702-8BC7EA4D9DEE}" 15 | EndProject 16 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AbstractFactory", "AbstractFactory\AbstractFactory.csproj", "{51C54352-1897-4749-BD39-660613C2235B}" 17 | EndProject 18 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "04 -Builder", "04 -Builder", "{21752809-82A5-4212-8444-166F656129FC}" 19 | EndProject 20 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Builder", "Builder\Builder.csproj", "{8552B7D4-35B3-4916-8D5D-D0479802BA35}" 21 | EndProject 22 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "05 - Prototype", "05 - Prototype", "{E0164F8E-AB94-4D3F-879A-6DB5F19FE84B}" 23 | EndProject 24 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Prototype", "Prototype\Prototype.csproj", "{1C69FD15-5FD4-49AF-B31F-F2A3407364EC}" 25 | EndProject 26 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "B - Structural", "B - Structural", "{BA4514FF-AA9E-402C-B074-5A16FF91FD6E}" 27 | EndProject 28 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "06 - Adapter", "06 - Adapter", "{60637BBF-C1E5-47EF-9994-7870B51913A3}" 29 | EndProject 30 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Adapter", "Adapter\Adapter.csproj", "{4E31DC34-C2C1-45C4-BC2D-21AFF98BDEB5}" 31 | EndProject 32 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "07 - Bridge", "07 - Bridge", "{7A473B8C-26AF-4CAE-B3E5-E0F091F7F4D2}" 33 | EndProject 34 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Bridge", "Bridge\Bridge.csproj", "{75E6E304-74F2-4D88-8589-4366B1A7684D}" 35 | EndProject 36 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "08 - Decorator", "08 - Decorator", "{46719157-346D-4BCE-B34D-55D2B5F2E93A}" 37 | EndProject 38 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Decorator", "Decorator\Decorator.csproj", "{12768030-04EF-4B1D-A0E9-7C96F6B73DBE}" 39 | EndProject 40 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "09 - Composite", "09 - Composite", "{E262BBA8-94AE-495C-85E6-FA54BA6A90A2}" 41 | EndProject 42 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Composite", "Composite\Composite.csproj", "{898A0BFF-C8CA-451D-BA92-DACABABFF53E}" 43 | EndProject 44 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "10 - Facade", "10 - Facade", "{BA606C2E-5A34-4290-AC23-58E5482CD300}" 45 | EndProject 46 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Facade", "Facade\Facade.csproj", "{2F4804B4-98BC-4DF6-8362-E96AA344A29A}" 47 | EndProject 48 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "11 - Proxy", "11 - Proxy", "{59DA4BDF-CFF5-4F06-8878-67F7900F37D7}" 49 | EndProject 50 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Proxy", "Proxy\Proxy.csproj", "{3BDFB38E-00D4-434E-8985-5D6661931089}" 51 | EndProject 52 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "12 - Flyweight", "12 - Flyweight", "{449D2089-E1E9-4097-8996-5E6E3D80B24C}" 53 | EndProject 54 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Flyweight", "Flyweight\Flyweight.csproj", "{ACCB5262-A3F5-4A77-864F-F27A3A3B5259}" 55 | EndProject 56 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Singleton", "Singleton\Singleton.csproj", "{347B70DD-B108-4DB3-B36E-01DC8ADB9C2C}" 57 | EndProject 58 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "C - Behavioral", "C - Behavioral", "{EE357574-412D-4C9D-A167-5002DE164362}" 59 | EndProject 60 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "15 - Command", "15 - Command", "{7736AF2A-2B94-42FB-A793-5020973687C8}" 61 | EndProject 62 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Command", "Command\Command.csproj", "{BA3B3232-7FC9-43AF-9AFE-E4F5211B4F1D}" 63 | EndProject 64 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "16 - Memento", "16 - Memento", "{C5BDE3AF-1138-4E87-8810-611687FFA522}" 65 | EndProject 66 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Memento", "Memento\Memento.csproj", "{176C219A-5E5A-4710-B360-E09DBC80690D}" 67 | EndProject 68 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "20 - State", "20 - State", "{0CC41725-98B1-4F2E-ACB9-3A0F47F65E97}" 69 | EndProject 70 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "State", "State\State.csproj", "{9D29533E-7C7F-4B72-9331-81EA8A9957D7}" 71 | EndProject 72 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "14 - Strategy", "14 - Strategy", "{62068BDC-394F-4A1E-825B-C7DE137900BB}" 73 | EndProject 74 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Strategy", "Strategy\Strategy.csproj", "{6E87E3A0-ECDB-47DD-B9E8-D9E31A27D812}" 75 | EndProject 76 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "17 - Mediator", "17 - Mediator", "{F71B79ED-777C-4707-9D38-CF15A476C55B}" 77 | EndProject 78 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Mediator", "Mediator\Mediator.csproj", "{913A71BA-D3BC-41F1-BA44-888AB8658630}" 79 | EndProject 80 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "18 - Chain of Responsibility", "18 - Chain of Responsibility", "{71A327E1-BA13-466C-B1A6-FA4551E8A670}" 81 | EndProject 82 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ChainOfResponsibility", "ChainOfResponsibility\ChainOfResponsibility.csproj", "{8768B99D-DC81-4951-BA46-8F1D10631C69}" 83 | EndProject 84 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "19 - Observer", "19 - Observer", "{162BE83E-9D99-494B-8464-BB0BEE0BCC81}" 85 | EndProject 86 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Observer", "Observer\Observer.csproj", "{8FA532ED-DB9D-47E7-AD53-31881953993A}" 87 | EndProject 88 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "21 - Iterator", "21 - Iterator", "{818D8FDD-1C97-48D8-AEEF-A7F193AA9187}" 89 | EndProject 90 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Iterator", "Iterator\Iterator.csproj", "{D4FEF27B-1C98-495E-93EF-1AC36ED810AB}" 91 | EndProject 92 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "22 - Visitor", "22 - Visitor", "{173BC868-E7AE-43AE-A05E-FD9BEEA980C7}" 93 | EndProject 94 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Visitor", "Visitor\Visitor.csproj", "{E3A37190-E73D-4F91-A249-9B5D18CF83AF}" 95 | EndProject 96 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "13 - Template Method", "13 - Template Method", "{1622583F-64EB-4F30-8D38-E897FF8FA140}" 97 | EndProject 98 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "TemplateMethod", "TemplateMethod\TemplateMethod.csproj", "{97CB88F2-868A-457A-90EB-89F55B9CBBF4}" 99 | EndProject 100 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "23 - Interpreter", "23 - Interpreter", "{FBA7CDD7-9BF5-4272-9414-C9A4DB6D5BDB}" 101 | EndProject 102 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Interpreter", "Interpreter\Interpreter.csproj", "{39C0A16A-B9F1-444B-9D5D-F46BBB84F746}" 103 | EndProject 104 | Global 105 | GlobalSection(SolutionConfigurationPlatforms) = preSolution 106 | Debug|Any CPU = Debug|Any CPU 107 | Release|Any CPU = Release|Any CPU 108 | EndGlobalSection 109 | GlobalSection(ProjectConfigurationPlatforms) = postSolution 110 | {1CDF5F40-3F42-4339-9702-8BC7EA4D9DEE}.Debug|Any CPU.ActiveCfg = Debug|Any CPU 111 | {1CDF5F40-3F42-4339-9702-8BC7EA4D9DEE}.Debug|Any CPU.Build.0 = Debug|Any CPU 112 | {1CDF5F40-3F42-4339-9702-8BC7EA4D9DEE}.Release|Any CPU.ActiveCfg = Release|Any CPU 113 | 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CPU.Build.0 = Release|Any CPU 194 | {97CB88F2-868A-457A-90EB-89F55B9CBBF4}.Debug|Any CPU.ActiveCfg = Debug|Any CPU 195 | {97CB88F2-868A-457A-90EB-89F55B9CBBF4}.Debug|Any CPU.Build.0 = Debug|Any CPU 196 | {97CB88F2-868A-457A-90EB-89F55B9CBBF4}.Release|Any CPU.ActiveCfg = Release|Any CPU 197 | {97CB88F2-868A-457A-90EB-89F55B9CBBF4}.Release|Any CPU.Build.0 = Release|Any CPU 198 | {39C0A16A-B9F1-444B-9D5D-F46BBB84F746}.Debug|Any CPU.ActiveCfg = Debug|Any CPU 199 | {39C0A16A-B9F1-444B-9D5D-F46BBB84F746}.Debug|Any CPU.Build.0 = Debug|Any CPU 200 | {39C0A16A-B9F1-444B-9D5D-F46BBB84F746}.Release|Any CPU.ActiveCfg = Release|Any CPU 201 | {39C0A16A-B9F1-444B-9D5D-F46BBB84F746}.Release|Any CPU.Build.0 = Release|Any CPU 202 | EndGlobalSection 203 | GlobalSection(SolutionProperties) = preSolution 204 | HideSolutionNode = FALSE 205 | EndGlobalSection 206 | GlobalSection(NestedProjects) = preSolution 207 | {482F9D07-99EE-4BF6-975F-295E89ECBCF9} = {B0F237CE-4C3B-467B-AB3F-7FED90583AB9} 208 | {E8783E99-05CD-4F71-B166-0FC1B90FC2C2} = {B0F237CE-4C3B-467B-AB3F-7FED90583AB9} 209 | {4763D927-A2E7-4322-8134-7D24DDD947F1} = {B0F237CE-4C3B-467B-AB3F-7FED90583AB9} 210 | {1CDF5F40-3F42-4339-9702-8BC7EA4D9DEE} = {E8783E99-05CD-4F71-B166-0FC1B90FC2C2} 211 | {51C54352-1897-4749-BD39-660613C2235B} = {4763D927-A2E7-4322-8134-7D24DDD947F1} 212 | {21752809-82A5-4212-8444-166F656129FC} = {B0F237CE-4C3B-467B-AB3F-7FED90583AB9} 213 | {8552B7D4-35B3-4916-8D5D-D0479802BA35} = {21752809-82A5-4212-8444-166F656129FC} 214 | {E0164F8E-AB94-4D3F-879A-6DB5F19FE84B} = {B0F237CE-4C3B-467B-AB3F-7FED90583AB9} 215 | {1C69FD15-5FD4-49AF-B31F-F2A3407364EC} = {E0164F8E-AB94-4D3F-879A-6DB5F19FE84B} 216 | {60637BBF-C1E5-47EF-9994-7870B51913A3} = {BA4514FF-AA9E-402C-B074-5A16FF91FD6E} 217 | {4E31DC34-C2C1-45C4-BC2D-21AFF98BDEB5} = {60637BBF-C1E5-47EF-9994-7870B51913A3} 218 | {7A473B8C-26AF-4CAE-B3E5-E0F091F7F4D2} = {BA4514FF-AA9E-402C-B074-5A16FF91FD6E} 219 | {75E6E304-74F2-4D88-8589-4366B1A7684D} = {7A473B8C-26AF-4CAE-B3E5-E0F091F7F4D2} 220 | {46719157-346D-4BCE-B34D-55D2B5F2E93A} = {BA4514FF-AA9E-402C-B074-5A16FF91FD6E} 221 | {12768030-04EF-4B1D-A0E9-7C96F6B73DBE} = {46719157-346D-4BCE-B34D-55D2B5F2E93A} 222 | {E262BBA8-94AE-495C-85E6-FA54BA6A90A2} = {BA4514FF-AA9E-402C-B074-5A16FF91FD6E} 223 | {898A0BFF-C8CA-451D-BA92-DACABABFF53E} = {E262BBA8-94AE-495C-85E6-FA54BA6A90A2} 224 | {BA606C2E-5A34-4290-AC23-58E5482CD300} = {BA4514FF-AA9E-402C-B074-5A16FF91FD6E} 225 | {2F4804B4-98BC-4DF6-8362-E96AA344A29A} = {BA606C2E-5A34-4290-AC23-58E5482CD300} 226 | {59DA4BDF-CFF5-4F06-8878-67F7900F37D7} = {BA4514FF-AA9E-402C-B074-5A16FF91FD6E} 227 | {3BDFB38E-00D4-434E-8985-5D6661931089} = {59DA4BDF-CFF5-4F06-8878-67F7900F37D7} 228 | {449D2089-E1E9-4097-8996-5E6E3D80B24C} = {BA4514FF-AA9E-402C-B074-5A16FF91FD6E} 229 | {ACCB5262-A3F5-4A77-864F-F27A3A3B5259} = {449D2089-E1E9-4097-8996-5E6E3D80B24C} 230 | {347B70DD-B108-4DB3-B36E-01DC8ADB9C2C} = {482F9D07-99EE-4BF6-975F-295E89ECBCF9} 231 | {7736AF2A-2B94-42FB-A793-5020973687C8} = {EE357574-412D-4C9D-A167-5002DE164362} 232 | {BA3B3232-7FC9-43AF-9AFE-E4F5211B4F1D} = {7736AF2A-2B94-42FB-A793-5020973687C8} 233 | {C5BDE3AF-1138-4E87-8810-611687FFA522} = {EE357574-412D-4C9D-A167-5002DE164362} 234 | {176C219A-5E5A-4710-B360-E09DBC80690D} = {C5BDE3AF-1138-4E87-8810-611687FFA522} 235 | {0CC41725-98B1-4F2E-ACB9-3A0F47F65E97} = {EE357574-412D-4C9D-A167-5002DE164362} 236 | {9D29533E-7C7F-4B72-9331-81EA8A9957D7} = {0CC41725-98B1-4F2E-ACB9-3A0F47F65E97} 237 | {62068BDC-394F-4A1E-825B-C7DE137900BB} = {EE357574-412D-4C9D-A167-5002DE164362} 238 | {6E87E3A0-ECDB-47DD-B9E8-D9E31A27D812} = {62068BDC-394F-4A1E-825B-C7DE137900BB} 239 | {F71B79ED-777C-4707-9D38-CF15A476C55B} = {EE357574-412D-4C9D-A167-5002DE164362} 240 | {913A71BA-D3BC-41F1-BA44-888AB8658630} = {F71B79ED-777C-4707-9D38-CF15A476C55B} 241 | {71A327E1-BA13-466C-B1A6-FA4551E8A670} = {EE357574-412D-4C9D-A167-5002DE164362} 242 | {8768B99D-DC81-4951-BA46-8F1D10631C69} = {71A327E1-BA13-466C-B1A6-FA4551E8A670} 243 | {162BE83E-9D99-494B-8464-BB0BEE0BCC81} = {EE357574-412D-4C9D-A167-5002DE164362} 244 | {8FA532ED-DB9D-47E7-AD53-31881953993A} = {162BE83E-9D99-494B-8464-BB0BEE0BCC81} 245 | {818D8FDD-1C97-48D8-AEEF-A7F193AA9187} = {EE357574-412D-4C9D-A167-5002DE164362} 246 | {D4FEF27B-1C98-495E-93EF-1AC36ED810AB} = {818D8FDD-1C97-48D8-AEEF-A7F193AA9187} 247 | {173BC868-E7AE-43AE-A05E-FD9BEEA980C7} = {EE357574-412D-4C9D-A167-5002DE164362} 248 | {E3A37190-E73D-4F91-A249-9B5D18CF83AF} = {173BC868-E7AE-43AE-A05E-FD9BEEA980C7} 249 | {1622583F-64EB-4F30-8D38-E897FF8FA140} = {EE357574-412D-4C9D-A167-5002DE164362} 250 | {97CB88F2-868A-457A-90EB-89F55B9CBBF4} = {1622583F-64EB-4F30-8D38-E897FF8FA140} 251 | {FBA7CDD7-9BF5-4272-9414-C9A4DB6D5BDB} = {EE357574-412D-4C9D-A167-5002DE164362} 252 | {39C0A16A-B9F1-444B-9D5D-F46BBB84F746} = {FBA7CDD7-9BF5-4272-9414-C9A4DB6D5BDB} 253 | EndGlobalSection 254 | GlobalSection(ExtensibilityGlobals) = postSolution 255 | SolutionGuid = {F84E1DA5-656F-4C72-9FBA-4A07AD3EE35E} 256 | EndGlobalSection 257 | EndGlobal 258 | -------------------------------------------------------------------------------- /Starter solution/Facade/Facade.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Starter solution/Facade/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace Facade 2 | { 3 | } 4 | -------------------------------------------------------------------------------- /Starter solution/Facade/Program.cs: -------------------------------------------------------------------------------- 1 | Console.Title = "Facade"; -------------------------------------------------------------------------------- /Starter solution/FactoryMethod/FactoryMethod.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Starter solution/FactoryMethod/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace FactoryMethod 2 | { 3 | 4 | } 5 | -------------------------------------------------------------------------------- /Starter solution/FactoryMethod/Program.cs: -------------------------------------------------------------------------------- 1 | Console.Title = "Factory Method"; -------------------------------------------------------------------------------- /Starter solution/Flyweight/Flyweight.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Starter solution/Flyweight/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace Flyweight 2 | { 3 | } 4 | -------------------------------------------------------------------------------- /Starter solution/Flyweight/Program.cs: -------------------------------------------------------------------------------- 1 | Console.Title = "Flyweight"; -------------------------------------------------------------------------------- /Starter solution/Interpreter/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace Interpreter 2 | { 3 | } 4 | -------------------------------------------------------------------------------- /Starter solution/Interpreter/Interpreter.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Starter solution/Interpreter/Program.cs: -------------------------------------------------------------------------------- 1 | Console.Title = "Interpreter"; -------------------------------------------------------------------------------- /Starter solution/Iterator/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace Iterator 2 | { 3 | } 4 | -------------------------------------------------------------------------------- /Starter solution/Iterator/Iterator.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Starter solution/Iterator/Program.cs: -------------------------------------------------------------------------------- 1 | Console.Title = "Iterator"; -------------------------------------------------------------------------------- /Starter solution/Mediator/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace Mediator 2 | { 3 | } 4 | -------------------------------------------------------------------------------- /Starter solution/Mediator/Mediator.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Starter solution/Mediator/Program.cs: -------------------------------------------------------------------------------- 1 | Console.Title = "Mediator"; -------------------------------------------------------------------------------- /Starter solution/Memento/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace Memento 2 | { 3 | } -------------------------------------------------------------------------------- /Starter solution/Memento/Memento.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Starter solution/Memento/Program.cs: -------------------------------------------------------------------------------- 1 | Console.Title = "Memento"; -------------------------------------------------------------------------------- /Starter solution/Observer/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace Observer 2 | { 3 | } 4 | -------------------------------------------------------------------------------- /Starter solution/Observer/Observer.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Starter solution/Observer/Program.cs: -------------------------------------------------------------------------------- 1 | Console.Title = "Observer"; -------------------------------------------------------------------------------- /Starter solution/Prototype/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace Prototype 2 | { 3 | 4 | } 5 | -------------------------------------------------------------------------------- /Starter solution/Prototype/Program.cs: -------------------------------------------------------------------------------- 1 | Console.Title = "Prototype"; -------------------------------------------------------------------------------- /Starter solution/Prototype/Prototype.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Starter solution/Proxy/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace Proxy 2 | { 3 | } 4 | -------------------------------------------------------------------------------- /Starter solution/Proxy/Program.cs: -------------------------------------------------------------------------------- 1 | Console.Title = "Proxy"; -------------------------------------------------------------------------------- /Starter solution/Proxy/Proxy.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Starter solution/Singleton/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace Singleton 2 | { 3 | 4 | } 5 | -------------------------------------------------------------------------------- /Starter solution/Singleton/Program.cs: -------------------------------------------------------------------------------- 1 | Console.Title = "Singleton"; -------------------------------------------------------------------------------- /Starter solution/Singleton/Singleton.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Starter solution/State/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace State 2 | { 3 | } 4 | -------------------------------------------------------------------------------- /Starter solution/State/Program.cs: -------------------------------------------------------------------------------- 1 | Console.Title = "State"; -------------------------------------------------------------------------------- /Starter solution/State/State.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Starter solution/Strategy/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace Strategy 2 | { 3 | } 4 | -------------------------------------------------------------------------------- /Starter solution/Strategy/Program.cs: -------------------------------------------------------------------------------- 1 | Console.Title = "Strategy"; -------------------------------------------------------------------------------- /Starter solution/Strategy/Strategy.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Starter solution/TemplateMethod/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace TemplateMethod 2 | { 3 | } 4 | -------------------------------------------------------------------------------- /Starter solution/TemplateMethod/Program.cs: -------------------------------------------------------------------------------- 1 | Console.Title = "Template Method"; -------------------------------------------------------------------------------- /Starter solution/TemplateMethod/TemplateMethod.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /Starter solution/Visitor/Implementation.cs: -------------------------------------------------------------------------------- 1 | namespace Visitor 2 | { 3 | } 4 | -------------------------------------------------------------------------------- /Starter solution/Visitor/Program.cs: -------------------------------------------------------------------------------- 1 | Console.Title = "Visitor"; -------------------------------------------------------------------------------- /Starter solution/Visitor/Visitor.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | --------------------------------------------------------------------------------