├── .gitattributes
├── .gitignore
├── AdapterPattern
├── AdapterPattern.csproj
├── IDuck.cs
├── ITurkey.cs
├── MallardDuck.cs
├── Program.cs
├── TurkeyAdapter.cs
└── WildTurkey.cs
├── BridgePattern
├── BridgePattern.csproj
├── FlyingEnchantment.cs
├── Hammer.cs
├── IEnchantment.cs
├── IWeapon.cs
├── Program.cs
├── SoulEatingEnchantment.cs
└── Sword.cs
├── BuilderPattern
├── BuilderPattern.csproj
├── Cook.cs
├── Hamburger.cs
├── IBuilder.cs
├── MyHamburgerBuilder.cs
├── Program.cs
└── WifesHamburgerBuilder.cs
├── CODE_OF_CONDUCT.md
├── ChainOfResponsibilityPattern
├── AdditionHandler.cs
├── BaseHandler.cs
├── ChainOfResponsibilityPattern.csproj
├── IHandler.cs
├── MultiplicationHandler.cs
├── Program.cs
└── SubtractionHandler.cs
├── CommandPattern
├── CommandPattern.csproj
├── Garage.cs
├── GarageDoorCloseCommand.cs
├── GarageDoorOpenCommand.cs
├── ICommand.cs
├── Light.cs
├── LightOffCommand.cs
├── LightOnCommand.cs
├── MacroCommand.cs
├── NoCommand.cs
├── OnOffStruct.cs
├── Program.cs
└── RemoteControl.cs
├── CompositePattern
├── Client.cs
├── CompositePattern.csproj
├── Menu.cs
├── MenuComponent.cs
├── MenuItem.cs
└── Program.cs
├── DecoratorPattern
├── Beverage.cs
├── CondimentDecorator.cs
├── DarkRoast.cs
├── DecoratorPattern.csproj
├── Espresso.cs
├── HouseBlend.cs
├── MochaCondiment.cs
├── Program.cs
└── WhipCondiment.cs
├── DesignPatternsDotNetCore.sln
├── FacadePattern
├── Dimmer.cs
├── Dvd.cs
├── DvdPlayer.cs
├── FacadePattern.csproj
├── HometheaterFacade.cs
└── Program.cs
├── FactoryPattern
├── Abstract Factory
│ ├── ChicagoIngredientsFactory.cs
│ ├── IIngredientsFactory.cs
│ ├── Ingredients
│ │ ├── CherryTomato.cs
│ │ ├── Cucumber.cs
│ │ ├── DeepDish.cs
│ │ ├── FreshClam.cs
│ │ ├── FrozenClam.cs
│ │ ├── Interfaces
│ │ │ ├── ICheese.cs
│ │ │ ├── IClam.cs
│ │ │ ├── IDough.cs
│ │ │ ├── ISauce.cs
│ │ │ └── IVeggies.cs
│ │ ├── Mozarella.cs
│ │ ├── Olive.cs
│ │ ├── Onion.cs
│ │ ├── Parmesan.cs
│ │ ├── Pepper.cs
│ │ ├── PlumTomato.cs
│ │ └── ThinCrust.cs
│ └── NYIngredientsFactory.cs
├── Factory Method
│ ├── ChicagoPizzaFactory.cs
│ ├── NYPizzaFactory.cs
│ └── PizzaFactory.cs
├── FactoryPattern.csproj
├── Helper.cs
├── Pizza
│ ├── CheesePizza.cs
│ ├── ClamPizza.cs
│ ├── Pizza.cs
│ └── VeggiePizza.cs
└── Program.cs
├── FlyweightPattern
├── BeverageFlyweightFactory.cs
├── BeverageType.cs
├── BubbleMilkTea.cs
├── BubbleTeaShop.cs
├── CoconutMilkTea.cs
├── FlyweightPattern.csproj
├── FoamMilkTea.cs
├── IBeverage.cs
├── OolingMilkTea.cs
└── Program.cs
├── IteratorPattern
├── BreakfastMenu.cs
├── BreakfastMenuEnum.cs
├── BreakfastMenuIterator.cs
├── Client.cs
├── DinnerMenu.cs
├── DinnerMenuEnum.cs
├── DinnerMenuIterator.cs
├── IteratorPattern.csproj
├── Menu.cs
└── Program.cs
├── LICENSE
├── MediatorPattern
├── Colleague.cs
├── Customer.cs
├── ManagerMediator.cs
├── Mediator.cs
├── MediatorPattern.csproj
├── Program.cs
├── Programmer.cs
└── Tester.cs
├── ObserverPattern
├── ObserverPattern.csproj
├── Program.cs
├── Unsubscriber.cs
├── Weather.cs
├── WeatherMonitor.cs
└── WeatherSupplier.cs
├── PrototypePattern
├── Circle.cs
├── IFigure.cs
├── Program.cs
├── PrototypePattern.csproj
└── Rectangle.cs
├── ProxyPattern
├── Image.cs
├── Program.cs
├── ProxyImage.cs
├── ProxyPattern.csproj
└── RealImage.cs
├── README.md
├── SingletonPattern.Tests
├── SingletonPattern.Tests.csproj
├── SingletonPatternTests.cs
└── Usings.cs
├── SingletonPattern
├── ChocolateBoiler.cs
├── Program.cs
├── Properties
│ └── AssemblyInfo.cs
├── SingletonPattern.csproj
└── Status.cs
├── StatePattern
├── GumballMachine.cs
├── HasQuarterState.cs
├── IState.cs
├── Legacy
│ ├── GumballMachine.cs
│ └── State.cs
├── NoQuarterState.cs
├── Program.cs
├── SoldOutState.cs
├── SoldState.cs
├── StatePattern.csproj
└── WinnerState.cs
├── StrategyPattern
├── FlyNope.cs
├── FlyWings.cs
├── IFlyBehaviour.cs
├── IQuackBehaviour.cs
├── Program.cs
├── QuackNope.cs
├── QuackNormal.cs
├── QuackSqueak.cs
└── StrategyPattern.csproj
├── TemplatePattern
├── Beverages
│ ├── Beverage.cs
│ ├── Coffee.cs
│ └── Tea.cs
├── Comparable
│ └── Person.cs
├── Program.cs
└── TemplatePattern.csproj
└── VisitorPattern
├── Apartment.cs
├── ApartmentVisitor.cs
├── Bedroom.cs
├── BedroomVisitor.cs
├── IUnitVisitor.cs
├── LivingRoom.cs
├── LivingRoomVisitor.cs
├── Program.cs
├── Studio.cs
├── StudioVisitor.cs
├── Unit.cs
└── VisitorPattern.csproj
/.gitattributes:
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--------------------------------------------------------------------------------
/AdapterPattern/AdapterPattern.csproj:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 | Exe
5 | net6.0
6 | enable
7 | enable
8 |
9 |
10 |
11 |
--------------------------------------------------------------------------------
/AdapterPattern/IDuck.cs:
--------------------------------------------------------------------------------
1 | namespace AdapterPattern
2 | {
3 | public interface IDuck
4 | {
5 | void Quack();
6 | void Fly();
7 | }
8 | }
9 |
--------------------------------------------------------------------------------
/AdapterPattern/ITurkey.cs:
--------------------------------------------------------------------------------
1 | namespace AdapterPattern
2 | {
3 | public interface ITurkey
4 | {
5 | void Gobble();
6 | void Fly();
7 | }
8 | }
9 |
--------------------------------------------------------------------------------
/AdapterPattern/MallardDuck.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace AdapterPattern
4 | {
5 | class MallardDuck : IDuck
6 | {
7 | public void Quack()
8 | {
9 | Console.WriteLine("Quack Quack Quack");
10 | }
11 |
12 | public void Fly()
13 | {
14 | Console.WriteLine("Flies 500 Metres");
15 | }
16 | }
17 | }
18 |
--------------------------------------------------------------------------------
/AdapterPattern/Program.cs:
--------------------------------------------------------------------------------
1 |
2 | namespace AdapterPattern
3 | {
4 | internal static class Program
5 | {
6 | private static void Main()
7 | {
8 | var turkey = new WildTurkey();
9 | var adapter = new TurkeyAdapter(turkey);
10 |
11 | Tester(adapter);
12 | }
13 |
14 | private static void Tester(IDuck duck)
15 | {
16 | duck.Fly();
17 | duck.Quack();
18 | }
19 | }
20 | }
21 |
--------------------------------------------------------------------------------
/AdapterPattern/TurkeyAdapter.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace AdapterPattern
4 | {
5 | public class TurkeyAdapter : IDuck
6 | {
7 | private readonly ITurkey _turkey;
8 |
9 | public TurkeyAdapter(ITurkey turkey)
10 | {
11 | _turkey = turkey;
12 | }
13 | public void Quack()
14 | {
15 | _turkey.Gobble();
16 | }
17 |
18 | public void Fly()
19 | {
20 | for (var i = 0; i < 5; i++)
21 | {
22 | _turkey.Fly();
23 | Console.WriteLine("Resting..");
24 | }
25 | }
26 | }
27 | }
--------------------------------------------------------------------------------
/AdapterPattern/WildTurkey.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace AdapterPattern
4 | {
5 | class WildTurkey : ITurkey
6 | {
7 | public void Gobble()
8 | {
9 | Console.WriteLine("Gobble Gobble Gobble");
10 | }
11 |
12 | public void Fly()
13 | {
14 | Console.WriteLine("Flies 100 Metres");
15 | }
16 | }
17 | }
18 |
--------------------------------------------------------------------------------
/BridgePattern/BridgePattern.csproj:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 | Exe
5 | net6.0
6 | enable
7 | enable
8 |
9 |
10 |
11 |
--------------------------------------------------------------------------------
/BridgePattern/FlyingEnchantment.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace BridgePattern
4 | {
5 | public class FlyingEnchantment : IEnchantment
6 | {
7 | public void OnActivate()
8 | {
9 | Console.WriteLine("The item begins to glow faintly.");
10 | }
11 |
12 | public void Apply()
13 | {
14 | Console.WriteLine("The item flies and strikes the enemies finally returning to owner's hand.");
15 | }
16 |
17 | public void OnDeactivate()
18 | {
19 | Console.WriteLine("The item's glow fades.");
20 | }
21 | }
22 | }
--------------------------------------------------------------------------------
/BridgePattern/Hammer.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace BridgePattern
4 | {
5 | public class Hammer : IWeapon
6 | {
7 | private readonly IEnchantment _enchantment;
8 | public Hammer(IEnchantment enchantment)
9 | {
10 | _enchantment = enchantment;
11 | }
12 |
13 | public void Wield()
14 | {
15 | Console.WriteLine("The hammer is wielded.");
16 | _enchantment.OnActivate();
17 | }
18 |
19 | public void Swing()
20 | {
21 | Console.WriteLine("The hammer is swinged.");
22 | _enchantment.Apply();
23 | }
24 |
25 | public void Unwield()
26 | {
27 | Console.WriteLine("The hammer is unwielded.");
28 | _enchantment.OnDeactivate();
29 | }
30 |
31 | public IEnchantment GetEnchantment()
32 | {
33 | return _enchantment;
34 | }
35 | }
36 | }
--------------------------------------------------------------------------------
/BridgePattern/IEnchantment.cs:
--------------------------------------------------------------------------------
1 | namespace BridgePattern
2 | {
3 | public interface IEnchantment
4 | {
5 | void OnActivate();
6 | void Apply();
7 | void OnDeactivate();
8 | }
9 | }
--------------------------------------------------------------------------------
/BridgePattern/IWeapon.cs:
--------------------------------------------------------------------------------
1 | namespace BridgePattern
2 | {
3 | public interface IWeapon
4 | {
5 | void Wield();
6 | void Swing();
7 | void Unwield();
8 | IEnchantment GetEnchantment();
9 | }
10 | }
--------------------------------------------------------------------------------
/BridgePattern/Program.cs:
--------------------------------------------------------------------------------
1 | namespace BridgePattern
2 | {
3 | internal static class Program
4 | {
5 | private static void Main()
6 | {
7 | IWeapon sword = new Sword(new FlyingEnchantment());
8 | sword.Wield();
9 | sword.Swing();
10 | sword.Unwield();
11 |
12 | IWeapon hammer = new Hammer(new SoulEatingEnchantment());
13 | hammer.Wield();
14 | hammer.Swing();
15 | hammer.Unwield();
16 | }
17 | }
18 | }
--------------------------------------------------------------------------------
/BridgePattern/SoulEatingEnchantment.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace BridgePattern
4 | {
5 | public class SoulEatingEnchantment : IEnchantment
6 | {
7 | public void OnActivate()
8 | {
9 | Console.WriteLine("The item spreads bloodlust.");
10 | }
11 |
12 | public void Apply()
13 | {
14 | Console.WriteLine("The item eats the soul of enemies.");
15 | }
16 |
17 | public void OnDeactivate()
18 | {
19 | Console.WriteLine("Bloodlust slowly disappears.");
20 | }
21 | }
22 | }
--------------------------------------------------------------------------------
/BridgePattern/Sword.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace BridgePattern
4 | {
5 | public class Sword : IWeapon
6 | {
7 | private readonly IEnchantment _enchantment;
8 |
9 | public Sword(IEnchantment enchantment)
10 | {
11 | _enchantment = enchantment;
12 | }
13 |
14 | public void Wield()
15 | {
16 | Console.WriteLine("The sword is wielded.");
17 | _enchantment.OnActivate();
18 | }
19 |
20 | public void Swing()
21 | {
22 | Console.WriteLine("The sword is swinged.");
23 | _enchantment.Apply();
24 | }
25 |
26 | public void Unwield()
27 | {
28 | Console.WriteLine("The sword is unwielded.");
29 | _enchantment.OnDeactivate();
30 | }
31 |
32 | public IEnchantment GetEnchantment()
33 | {
34 | return _enchantment;
35 | }
36 | }
37 | }
--------------------------------------------------------------------------------
/BuilderPattern/BuilderPattern.csproj:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 | Exe
5 | net6.0
6 | enable
7 | enable
8 |
9 |
10 |
11 |
--------------------------------------------------------------------------------
/BuilderPattern/Cook.cs:
--------------------------------------------------------------------------------
1 | namespace BuilderPattern
2 | {
3 |
4 | // This class can also be called the Director
5 | public class Cook
6 | {
7 | private IBuilder _builder;
8 | public Cook(IBuilder builder)
9 | {
10 | AcceptBuilder(builder);
11 | }
12 |
13 | public void ChangeBuilder(IBuilder builder)
14 | {
15 | AcceptBuilder(builder);
16 | }
17 |
18 | public Hamburger Build()
19 | {
20 | _builder.AddIngredients();
21 | _builder.AddShape();
22 | _builder.AddSize();
23 | return _builder.Build();
24 | }
25 |
26 | private void AcceptBuilder(IBuilder builder)
27 | {
28 | _builder = builder;
29 | _builder.Reset();
30 | }
31 | }
32 | }
33 |
--------------------------------------------------------------------------------
/BuilderPattern/Hamburger.cs:
--------------------------------------------------------------------------------
1 |
2 | namespace BuilderPattern
3 | {
4 | public class Hamburger
5 | {
6 | public int Size { get; set; }
7 | public string Shape { get; set; }
8 | public string[] Ingredients { get; set; }
9 | public override string ToString()
10 | {
11 | var hamburger = "";
12 | foreach (var ingredient in Ingredients)
13 | {
14 | hamburger += $"{ingredient} ";
15 | }
16 | return $"Ingredients: {hamburger}, Size: {Size}, Shape: {Shape}";
17 | }
18 | }
19 | }
20 |
--------------------------------------------------------------------------------
/BuilderPattern/IBuilder.cs:
--------------------------------------------------------------------------------
1 | namespace BuilderPattern
2 | {
3 | public interface IBuilder
4 | {
5 | void AddIngredients();
6 | void AddShape();
7 | void AddSize();
8 | void Reset();
9 | Hamburger Build();
10 | }
11 | }
12 |
--------------------------------------------------------------------------------
/BuilderPattern/MyHamburgerBuilder.cs:
--------------------------------------------------------------------------------
1 | namespace BuilderPattern
2 | {
3 | public class MyHamburgerBuilder : IBuilder
4 | {
5 | private Hamburger _hamburger;
6 | public void AddIngredients()
7 | {
8 | _hamburger.Ingredients = new string[] { "Bread", "Meat", "Tomato", "Salad", "Mayonnaise" };
9 | }
10 |
11 | public void AddShape()
12 | {
13 | _hamburger.Shape = "Kite";
14 | }
15 |
16 | public void AddSize()
17 | {
18 | _hamburger.Size = 10; //inches
19 | }
20 | public void Reset()
21 | {
22 | _hamburger = new Hamburger();
23 | }
24 |
25 | public Hamburger Build()
26 | {
27 | return _hamburger;
28 | }
29 |
30 | }
31 | }
32 |
--------------------------------------------------------------------------------
/BuilderPattern/Program.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace BuilderPattern
4 | {
5 | class Program
6 | {
7 | static void Main()
8 | {
9 | var builder = new MyHamburgerBuilder();
10 | var cook = new Cook(builder);
11 | var myHamburger = cook.Build();
12 |
13 | cook.ChangeBuilder(new WifesHamburgerBuilder());
14 | var wifesHamburger = cook.Build();
15 |
16 | Console.WriteLine($"My Hamburger: {myHamburger}");
17 | Console.WriteLine($"My Wife's Hamburger: {wifesHamburger}");
18 | }
19 | }
20 | }
21 |
--------------------------------------------------------------------------------
/BuilderPattern/WifesHamburgerBuilder.cs:
--------------------------------------------------------------------------------
1 | namespace BuilderPattern
2 | {
3 |
4 | public class WifesHamburgerBuilder : IBuilder
5 | {
6 | private Hamburger _hamburger;
7 | public void AddIngredients()
8 | {
9 | _hamburger.Ingredients = new string[] { "Bread", "Salad" };
10 | }
11 |
12 | public void AddShape()
13 | {
14 | _hamburger.Shape = "Cuboid";
15 | }
16 |
17 | public void AddSize()
18 | {
19 | _hamburger.Size = 6; //inches
20 | }
21 |
22 | public void Reset()
23 | {
24 | _hamburger = new Hamburger();
25 | }
26 | public Hamburger Build()
27 | {
28 | return _hamburger;
29 | }
30 | }
31 | }
32 |
--------------------------------------------------------------------------------
/CODE_OF_CONDUCT.md:
--------------------------------------------------------------------------------
1 | # Contributor Covenant Code of Conduct
2 |
3 | ## Our Pledge
4 |
5 | In the interest of fostering an open and welcoming environment, we as contributors and maintainers pledge to making participation in our project and our community a harassment-free experience for everyone, regardless of age, body size, disability, ethnicity, gender identity and expression, level of experience, nationality, personal appearance, race, religion, or sexual identity and orientation.
6 |
7 | ## Our Standards
8 |
9 | Examples of behavior that contributes to creating a positive environment include:
10 |
11 | * Using welcoming and inclusive language
12 | * Being respectful of differing viewpoints and experiences
13 | * Gracefully accepting constructive criticism
14 | * Focusing on what is best for the community
15 | * Showing empathy towards other community members
16 |
17 | Examples of unacceptable behavior by participants include:
18 |
19 | * The use of sexualized language or imagery and unwelcome sexual attention or advances
20 | * Trolling, insulting/derogatory comments, and personal or political attacks
21 | * Public or private harassment
22 | * Publishing others' private information, such as a physical or electronic address, without explicit permission
23 | * Other conduct which could reasonably be considered inappropriate in a professional setting
24 |
25 | ## Our Responsibilities
26 |
27 | Project maintainers are responsible for clarifying the standards of acceptable behavior and are expected to take appropriate and fair corrective action in response to any instances of unacceptable behavior.
28 |
29 | Project maintainers have the right and responsibility to remove, edit, or reject comments, commits, code, wiki edits, issues, and other contributions that are not aligned to this Code of Conduct, or to ban temporarily or permanently any contributor for other behaviors that they deem inappropriate, threatening, offensive, or harmful.
30 |
31 | ## Scope
32 |
33 | This Code of Conduct applies both within project spaces and in public spaces when an individual is representing the project or its community. Examples of representing a project or community include using an official project e-mail address, posting via an official social media account, or acting as an appointed representative at an online or offline event. Representation of a project may be further defined and clarified by project maintainers.
34 |
35 | ## Enforcement
36 |
37 | Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting the project team at abishekaditya@outlook.com. The project team will review and investigate all complaints, and will respond in a way that it deems appropriate to the circumstances. The project team is obligated to maintain confidentiality with regard to the reporter of an incident. Further details of specific enforcement policies may be posted separately.
38 |
39 | Project maintainers who do not follow or enforce the Code of Conduct in good faith may face temporary or permanent repercussions as determined by other members of the project's leadership.
40 |
41 | ## Attribution
42 |
43 | This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4, available at [http://contributor-covenant.org/version/1/4][version]
44 |
45 | [homepage]: http://contributor-covenant.org
46 | [version]: http://contributor-covenant.org/version/1/4/
47 |
--------------------------------------------------------------------------------
/ChainOfResponsibilityPattern/AdditionHandler.cs:
--------------------------------------------------------------------------------
1 | using System;
2 | using System.Collections.Generic;
3 | using System.Text;
4 |
5 | namespace ChainOfResponsibilityPattern {
6 | public class AdditionHandler : BaseHandler {
7 | public override double? Handle(double[] values, string action) {
8 | if (action.ToLower() == "add") {
9 | double result=0.0;
10 | foreach (var value in values) {
11 | result += value;
12 | }
13 | return result;
14 | }
15 | else {
16 | return _nextInLine?.Handle(values,action);
17 | }
18 | }
19 | }
20 | }
21 |
--------------------------------------------------------------------------------
/ChainOfResponsibilityPattern/BaseHandler.cs:
--------------------------------------------------------------------------------
1 | namespace ChainOfResponsibilityPattern {
2 | public abstract class BaseHandler : IHandler {
3 | public void AddChain(IHandler handler) {
4 | _nextInLine = handler;
5 | }
6 |
7 | public abstract double? Handle(double[] values, string action);
8 |
9 | protected IHandler _nextInLine;
10 | }
11 | }
12 |
--------------------------------------------------------------------------------
/ChainOfResponsibilityPattern/ChainOfResponsibilityPattern.csproj:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 | Exe
5 | net6.0
6 | enable
7 | enable
8 |
9 |
10 |
11 |
--------------------------------------------------------------------------------
/ChainOfResponsibilityPattern/IHandler.cs:
--------------------------------------------------------------------------------
1 | namespace ChainOfResponsibilityPattern {
2 | public interface IHandler {
3 | void AddChain(IHandler handler);
4 | double? Handle(double[] values, string action);
5 | }
6 | }
7 |
--------------------------------------------------------------------------------
/ChainOfResponsibilityPattern/MultiplicationHandler.cs:
--------------------------------------------------------------------------------
1 | namespace ChainOfResponsibilityPattern {
2 | public class MultiplicationHandler : BaseHandler {
3 | public override double? Handle(double[] values, string action) {
4 | if (action.ToLower() == "multiply") {
5 | var result = 1.0;
6 | foreach (var value in values) {
7 | result *= value;
8 | }
9 | return result;
10 | }
11 | else {
12 | return _nextInLine?.Handle(values, action);
13 | }
14 | }
15 | }
16 | }
17 |
--------------------------------------------------------------------------------
/ChainOfResponsibilityPattern/Program.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace ChainOfResponsibilityPattern {
4 | class Program {
5 | static void Main(string[] args) {
6 | //create handlers
7 | var additionHandler = new AdditionHandler();
8 | var subtractionHandler = new SubtractionHandler();
9 | var multiplicationHander = new MultiplicationHandler();
10 | //create chain
11 | subtractionHandler.AddChain(multiplicationHander);
12 | additionHandler.AddChain(subtractionHandler);
13 | //Execution
14 | double[] numbers = new double[] { 2, 3, 4, 5 };
15 | var additionResult = additionHandler.Handle(numbers, "Add");
16 | var subtractionResult = additionHandler.Handle(numbers, "Minus");
17 | var multResult = additionHandler.Handle(numbers, "Multiply");
18 | var divisionResult = additionHandler.Handle(numbers, "divide"); // Divide is not in the chain!!!
19 |
20 | Console.WriteLine("Addition = {0}",additionResult);
21 | Console.WriteLine("Subtraction = {0}", subtractionResult);
22 | Console.WriteLine("Multiplication = {0}", multResult);
23 | Console.WriteLine("Division = {0}", divisionResult);
24 | }
25 | }
26 | }
27 |
--------------------------------------------------------------------------------
/ChainOfResponsibilityPattern/SubtractionHandler.cs:
--------------------------------------------------------------------------------
1 | namespace ChainOfResponsibilityPattern {
2 | public class SubtractionHandler : BaseHandler {
3 | public override double? Handle(double[] values, string action) {
4 | if (action.ToLower() == "minus") {
5 | var result = values[0];
6 | for (int i = 1; i < values.Length; i++) {
7 | result -= values[i];
8 | }
9 | return result;
10 | }
11 | else {
12 | return _nextInLine?.Handle(values, action);
13 | }
14 | }
15 | }
16 | }
17 |
--------------------------------------------------------------------------------
/CommandPattern/CommandPattern.csproj:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 | Exe
5 | net6.0
6 | enable
7 | enable
8 |
9 |
10 |
11 |
--------------------------------------------------------------------------------
/CommandPattern/Garage.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace CommandPattern
4 | {
5 | internal class Garage
6 | {
7 | private readonly string _name;
8 |
9 | public Garage(string name)
10 | {
11 | _name = name;
12 | }
13 |
14 | internal void Open()
15 | {
16 | Console.WriteLine($"{_name} Garage Opened");
17 | }
18 |
19 | internal void Close()
20 | {
21 | Console.WriteLine($"{_name} Garage Closed");
22 | }
23 | }
24 | }
--------------------------------------------------------------------------------
/CommandPattern/GarageDoorCloseCommand.cs:
--------------------------------------------------------------------------------
1 | namespace CommandPattern
2 | {
3 | internal class GarageDoorCloseCommand : ICommand
4 | {
5 | private readonly Garage _garage;
6 |
7 | public GarageDoorCloseCommand(Garage g)
8 | {
9 | _garage = g;
10 | }
11 |
12 | public void Execute()
13 | {
14 | _garage.Close();
15 | }
16 |
17 | public void Undo()
18 | {
19 | _garage.Open();
20 | }
21 | }
22 | }
--------------------------------------------------------------------------------
/CommandPattern/GarageDoorOpenCommand.cs:
--------------------------------------------------------------------------------
1 | namespace CommandPattern
2 | {
3 | internal class GarageDoorOpenCommand : ICommand
4 | {
5 | private readonly Garage _garage;
6 |
7 | public GarageDoorOpenCommand(Garage g)
8 | {
9 | _garage = g;
10 | }
11 |
12 | public void Execute()
13 | {
14 | _garage.Open();
15 | }
16 |
17 | public void Undo()
18 | {
19 | _garage.Close();
20 | }
21 | }
22 | }
--------------------------------------------------------------------------------
/CommandPattern/ICommand.cs:
--------------------------------------------------------------------------------
1 | namespace CommandPattern
2 | {
3 | internal interface ICommand
4 | {
5 | void Execute();
6 | void Undo();
7 | }
8 | }
--------------------------------------------------------------------------------
/CommandPattern/Light.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace CommandPattern
4 | {
5 | public class Light
6 | {
7 | private readonly string _name;
8 |
9 | public Light(string name)
10 | {
11 | _name = name;
12 | }
13 |
14 | internal void On()
15 | {
16 | Console.WriteLine($"{_name} Light On");
17 | }
18 |
19 | internal void Off()
20 | {
21 | Console.WriteLine($"{_name} Light Off");
22 | }
23 | }
24 | }
--------------------------------------------------------------------------------
/CommandPattern/LightOffCommand.cs:
--------------------------------------------------------------------------------
1 | namespace CommandPattern
2 | {
3 | internal class LightOffCommand : ICommand
4 | {
5 | private readonly Light _light;
6 |
7 | public LightOffCommand(Light l)
8 | {
9 | _light = l;
10 | }
11 |
12 | public void Execute()
13 | {
14 | _light.Off();
15 | }
16 |
17 | public void Undo()
18 | {
19 | _light.On();
20 | }
21 | }
22 | }
--------------------------------------------------------------------------------
/CommandPattern/LightOnCommand.cs:
--------------------------------------------------------------------------------
1 | namespace CommandPattern
2 | {
3 | internal class LightOnCommand : ICommand
4 | {
5 | private readonly Light _light;
6 |
7 | public LightOnCommand(Light l)
8 | {
9 | _light = l;
10 | }
11 |
12 | public void Execute()
13 | {
14 | _light.On();
15 | }
16 |
17 | public void Undo()
18 | {
19 | _light.Off();
20 | }
21 | }
22 | }
--------------------------------------------------------------------------------
/CommandPattern/MacroCommand.cs:
--------------------------------------------------------------------------------
1 | namespace CommandPattern
2 | {
3 | internal class MacroCommand : ICommand
4 | {
5 | private readonly ICommand[] _commands;
6 |
7 | public MacroCommand(ICommand[] commands)
8 | {
9 | _commands = commands;
10 | }
11 |
12 | public void Execute()
13 | {
14 | foreach (var item in _commands)
15 | item.Execute();
16 | }
17 |
18 | public void Undo()
19 | {
20 | foreach (var item in _commands)
21 | item.Undo();
22 | }
23 | }
24 | }
--------------------------------------------------------------------------------
/CommandPattern/NoCommand.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace CommandPattern
4 | {
5 | internal class NoCommand : ICommand
6 | {
7 | public void Execute()
8 | {
9 | Console.WriteLine("No Command Assigned");
10 | }
11 |
12 | public void Undo()
13 | {
14 | Execute();
15 | }
16 | }
17 | }
--------------------------------------------------------------------------------
/CommandPattern/OnOffStruct.cs:
--------------------------------------------------------------------------------
1 | namespace CommandPattern
2 | {
3 | internal struct OnOffStruct
4 | {
5 | public ICommand On;
6 | public ICommand Off;
7 | }
8 | }
--------------------------------------------------------------------------------
/CommandPattern/Program.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace CommandPattern
4 | {
5 | internal static class Program
6 | {
7 | private static void Main()
8 | {
9 | var remote = new RemoteControl(3);
10 |
11 |
12 | var bike = new Garage("Bike");
13 | var bikeDoorClose = new GarageDoorCloseCommand(bike);
14 | var bikeDoorOpen = new GarageDoorOpenCommand(bike);
15 |
16 | var car = new Garage("Car");
17 | var carDoorClose = new GarageDoorCloseCommand(car);
18 | var carDoorOpen = new GarageDoorOpenCommand(car);
19 |
20 | var garageButton = new OnOffStruct
21 | {
22 | On = bikeDoorOpen,
23 | Off = bikeDoorClose
24 | };
25 |
26 | remote[0] = garageButton;
27 | remote.PushOn(0);
28 | remote.PushUndo();
29 | remote.PushUndo();
30 | remote.PushOff(0);
31 |
32 |
33 | Console.WriteLine();
34 | var light = new Light("Hall");
35 |
36 | ICommand[] partyOn = { new LightOffCommand(light), bikeDoorOpen, carDoorOpen };
37 | ICommand[] partyOff = { new LightOnCommand(light), bikeDoorClose, carDoorClose };
38 |
39 |
40 | remote[2] = new OnOffStruct { On = new MacroCommand(partyOn), Off = new MacroCommand(partyOff) };
41 |
42 | try
43 | {
44 | remote.PushOn(2);
45 | Console.WriteLine();
46 | remote.PushOff(2);
47 | }
48 | catch (Exception)
49 | {
50 | Console.WriteLine("Oops");
51 | }
52 | }
53 | }
54 | }
--------------------------------------------------------------------------------
/CommandPattern/RemoteControl.cs:
--------------------------------------------------------------------------------
1 | namespace CommandPattern
2 | {
3 | internal class RemoteControl
4 | {
5 | private readonly ICommand[] _offCommand;
6 | private readonly ICommand[] _onCommand;
7 | private ICommand _undoCommand;
8 |
9 | public RemoteControl(int slots)
10 | {
11 | _onCommand = new ICommand[slots];
12 | _offCommand = new ICommand[slots];
13 |
14 | var none = new NoCommand();
15 | _undoCommand = none;
16 | for (var i = 0; i < slots; i++)
17 | {
18 | _onCommand[i] = none;
19 | _offCommand[i] = none;
20 | }
21 | }
22 |
23 |
24 | public OnOffStruct this[int i]
25 | {
26 | set
27 | {
28 | _onCommand[i] = value.On;
29 | _offCommand[i] = value.Off;
30 | }
31 | }
32 |
33 | public void PushOn(int slot)
34 | {
35 | _onCommand[slot].Execute();
36 | _undoCommand = _offCommand[slot];
37 | }
38 |
39 | public void PushOff(int slot)
40 | {
41 | _offCommand[slot].Execute();
42 | _undoCommand = _onCommand[slot];
43 | }
44 |
45 | public void PushUndo()
46 | {
47 | _undoCommand.Execute();
48 | }
49 | }
50 | }
--------------------------------------------------------------------------------
/CompositePattern/Client.cs:
--------------------------------------------------------------------------------
1 | namespace CompositePattern
2 | {
3 | public class Client
4 | {
5 | private readonly MenuComponent _menus;
6 |
7 | public Client(MenuComponent menus)
8 | {
9 | _menus = menus;
10 | }
11 |
12 | public void Print()
13 | {
14 | _menus.Print();
15 | }
16 | }
17 | }
--------------------------------------------------------------------------------
/CompositePattern/CompositePattern.csproj:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 | Exe
5 | net6.0
6 | enable
7 | enable
8 |
9 |
10 |
11 |
--------------------------------------------------------------------------------
/CompositePattern/Menu.cs:
--------------------------------------------------------------------------------
1 | using System;
2 | using System.Collections.Generic;
3 |
4 | namespace CompositePattern
5 | {
6 | public class Menu : MenuComponent
7 | {
8 | List _components = new List();
9 |
10 | public Menu(string name, string description)
11 | {
12 | Name = name;
13 | Description = description;
14 |
15 | }
16 |
17 | public override void Add(MenuComponent component)
18 | {
19 | _components.Add(component);
20 | }
21 |
22 | public override void Remove(MenuComponent component)
23 | {
24 | _components.Remove(component);
25 | }
26 |
27 | public override MenuComponent GetChild(int i)
28 | {
29 | return _components[i];
30 | }
31 |
32 | public override string Name { get; }
33 |
34 | public override string Description { get; }
35 |
36 | public override void Print()
37 | {
38 | Console.WriteLine(Name);
39 | Console.WriteLine("___________");
40 | foreach (var menuComponent in _components)
41 | {
42 | menuComponent.Print();
43 | }
44 | Console.WriteLine();
45 | }
46 | }
47 | }
--------------------------------------------------------------------------------
/CompositePattern/MenuComponent.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace CompositePattern
4 | {
5 | public class MenuComponent
6 | {
7 | public virtual void Add(MenuComponent component)
8 | {
9 | throw new NotImplementedException();
10 | }
11 |
12 | public virtual void Remove(MenuComponent component)
13 | {
14 | throw new NotImplementedException();
15 | }
16 |
17 | public virtual MenuComponent GetChild(int i)
18 | {
19 | throw new NotImplementedException();
20 | }
21 |
22 | public virtual string Name { get; }
23 | public virtual string Description { get; }
24 | public virtual bool Vegetarian { get; }
25 | public virtual double Price { get; }
26 |
27 | public virtual void Print()
28 | {
29 | throw new NotImplementedException();
30 | }
31 | }
32 | }
--------------------------------------------------------------------------------
/CompositePattern/MenuItem.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace CompositePattern
4 | {
5 | public class MenuItem : MenuComponent
6 | {
7 | public MenuItem(string name, string description, double price, bool isveg)
8 | {
9 | Name = name;
10 | Description = description;
11 | Price = price;
12 | Vegetarian = isveg;
13 | }
14 |
15 | public override string Name { get; }
16 |
17 | public override string Description { get; }
18 |
19 | public override double Price { get; }
20 |
21 | public override bool Vegetarian { get; }
22 |
23 | public override void Print()
24 | {
25 | Console.WriteLine($"{Name} : {Price} {(Vegetarian ? '+' : '*')} \n {Description}");
26 | }
27 | }
28 | }
--------------------------------------------------------------------------------
/CompositePattern/Program.cs:
--------------------------------------------------------------------------------
1 | namespace CompositePattern
2 | {
3 | static class Program
4 | {
5 | public static void Main()
6 | {
7 |
8 | var breakfast = new Menu("Breakfast", "Pancake House");
9 | var lunch = new Menu("Lunch", "Deli Diner");
10 | var dinner = new Menu("Dinner", "Dinneroni");
11 |
12 | var dessert = new Menu("Dessert", "Ice Cream");
13 |
14 | var menu = new Menu("All", "McDonalds");
15 |
16 | breakfast.Add(new MenuItem("Waffles", "Butterscotch waffles", 140, false));
17 | breakfast.Add(new MenuItem("Corn Flakes", "Kellogs", 80, true));
18 |
19 | lunch.Add(new MenuItem("Burger", "Cheese and Onion Burger", 250, true));
20 | lunch.Add(new MenuItem("Sandwich", "Chicken Sandwich", 280, false));
21 |
22 | dinner.Add(new MenuItem("Pizza", "Cheese and Tomato Pizza", 210, true));
23 | dinner.Add(new MenuItem("Pasta", "Chicken Pasta", 280, false));
24 |
25 | dessert.Add(new MenuItem("Ice Cream", "Vanilla and Chocolate", 120, true));
26 | dessert.Add(new MenuItem("Cake", "Choclate Cake Slice", 180, false));
27 |
28 | dinner.Add(dessert);
29 | menu.Add(breakfast);
30 | menu.Add(lunch);
31 | menu.Add(dinner);
32 |
33 | menu.Print();
34 |
35 | }
36 | }
37 | }
38 |
--------------------------------------------------------------------------------
/DecoratorPattern/Beverage.cs:
--------------------------------------------------------------------------------
1 | namespace DecoratorPattern
2 | {
3 | abstract class Beverage
4 | {
5 | protected string _description = "No Description";
6 | public abstract string Description { get; }
7 | public abstract double Cost();
8 | }
9 | }
10 |
--------------------------------------------------------------------------------
/DecoratorPattern/CondimentDecorator.cs:
--------------------------------------------------------------------------------
1 | namespace DecoratorPattern
2 | {
3 | abstract class CondimentDecorator : Beverage
4 | {
5 | public abstract override string Description { get; }
6 | }
7 |
8 | }
9 |
--------------------------------------------------------------------------------
/DecoratorPattern/DarkRoast.cs:
--------------------------------------------------------------------------------
1 | namespace DecoratorPattern
2 | {
3 | internal class DarkRoast : Beverage
4 | {
5 | public DarkRoast()
6 | {
7 | _description = "Dark Roast";
8 | }
9 |
10 | public override string Description => _description;
11 |
12 | public override double Cost()
13 | {
14 | return 1.49;
15 | }
16 | }
17 | }
--------------------------------------------------------------------------------
/DecoratorPattern/DecoratorPattern.csproj:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 | Exe
5 | net6.0
6 | enable
7 | enable
8 |
9 |
10 |
11 |
--------------------------------------------------------------------------------
/DecoratorPattern/Espresso.cs:
--------------------------------------------------------------------------------
1 | namespace DecoratorPattern
2 | {
3 | class Espresso : Beverage
4 | {
5 | public Espresso()
6 | {
7 | _description = "Espresso";
8 | }
9 |
10 | public override string Description => _description;
11 |
12 | public override double Cost()
13 | {
14 | return 1.99;
15 | }
16 | }
17 | }
18 |
--------------------------------------------------------------------------------
/DecoratorPattern/HouseBlend.cs:
--------------------------------------------------------------------------------
1 | namespace DecoratorPattern
2 | {
3 | class HouseBlend : Beverage
4 | {
5 | public HouseBlend()
6 | {
7 | _description = "House Blend";
8 | }
9 |
10 | public override string Description => _description;
11 |
12 | public override double Cost()
13 | {
14 | return 2.49;
15 | }
16 | }
17 | }
18 |
--------------------------------------------------------------------------------
/DecoratorPattern/MochaCondiment.cs:
--------------------------------------------------------------------------------
1 | namespace DecoratorPattern
2 | {
3 | class MochaCondiment : CondimentDecorator
4 | {
5 | Beverage _beverage;
6 |
7 | public MochaCondiment(Beverage beverage)
8 | {
9 | this._beverage = beverage;
10 | }
11 |
12 | public override string Description
13 | {
14 | get
15 | {
16 | if (_beverage.Description.StartsWith("Mocha"))
17 | {
18 | return "Double " + _beverage.Description;
19 | }
20 | else
21 | return "Mocha " + _beverage.Description;
22 | }
23 | }
24 |
25 | public override double Cost()
26 | {
27 | return 0.2 + _beverage.Cost();
28 | }
29 | }
30 | }
31 |
--------------------------------------------------------------------------------
/DecoratorPattern/Program.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace DecoratorPattern
4 | {
5 | static class Program
6 | {
7 | static void Main()
8 | {
9 | Beverage beverage = new Espresso();
10 | Console.WriteLine(beverage.Description + " $" + beverage.Cost());
11 |
12 | Beverage beverage2 = new DarkRoast();
13 | beverage2 = new MochaCondiment(beverage2);
14 | beverage2 = new MochaCondiment(beverage2);
15 | beverage2 = new WhipCondiment(beverage2);
16 | Console.WriteLine(beverage2.Description + " $" + beverage2.Cost());
17 |
18 | Beverage beverage3 = new HouseBlend();
19 | beverage3 = new MochaCondiment(beverage3);
20 | beverage3 = new WhipCondiment(beverage3);
21 | Console.WriteLine(beverage3.Description + " $" + beverage3.Cost());
22 | }
23 | }
24 | }
25 |
--------------------------------------------------------------------------------
/DecoratorPattern/WhipCondiment.cs:
--------------------------------------------------------------------------------
1 | namespace DecoratorPattern
2 | {
3 | class WhipCondiment : CondimentDecorator
4 | {
5 | Beverage _beverage;
6 |
7 | public WhipCondiment(Beverage beverage)
8 | {
9 | this._beverage = beverage;
10 | }
11 |
12 | public override string Description
13 | {
14 | get
15 | {
16 | if (_beverage.Description.StartsWith("Whip"))
17 | {
18 | return "Double " + _beverage.Description;
19 | }
20 | else
21 | return "Whip " + _beverage.Description;
22 | }
23 | }
24 |
25 | public override double Cost()
26 | {
27 | return 0.15 + _beverage.Cost();
28 | }
29 | }
30 | }
31 |
--------------------------------------------------------------------------------
/DesignPatternsDotNetCore.sln:
--------------------------------------------------------------------------------
1 | Microsoft Visual Studio Solution File, Format Version 12.00
2 | # Visual Studio Version 17
3 | VisualStudioVersion = 17.3.32825.248
4 | MinimumVisualStudioVersion = 15.0.26124.0
5 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AdapterPattern", "AdapterPattern\AdapterPattern.csproj", "{79553F75-E8DC-4988-B511-A79CC6A9CDF7}"
6 | EndProject
7 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "CommandPattern", "CommandPattern\CommandPattern.csproj", "{AC6ED373-CE32-41E4-B38A-64B8700E46C9}"
8 | EndProject
9 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "CompositePattern", "CompositePattern\CompositePattern.csproj", "{21754CEF-8885-4EED-91AF-73FF2514553D}"
10 | EndProject
11 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "DecoratorPattern", "DecoratorPattern\DecoratorPattern.csproj", "{5F9D7DA1-FA5E-477C-87D7-2A131C99D090}"
12 | EndProject
13 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FacadePattern", "FacadePattern\FacadePattern.csproj", "{CCDDFDE2-9958-476C-91DB-9F2907887ADE}"
14 | EndProject
15 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "IteratorPattern", "IteratorPattern\IteratorPattern.csproj", "{C50111DC-B037-4A4C-ACA1-5BDE93F7D42A}"
16 | EndProject
17 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ObserverPattern", "ObserverPattern\ObserverPattern.csproj", "{DDE34459-B244-43F9-8DE2-8D1E70CB6609}"
18 | EndProject
19 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SingletonPattern", "SingletonPattern\SingletonPattern.csproj", "{FA82E572-FC03-4C87-86FA-660AF06AA24A}"
20 | EndProject
21 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "StatePattern", "StatePattern\StatePattern.csproj", "{1C0A4103-B8E6-4AE1-88DA-B3EBC37B2441}"
22 | EndProject
23 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "StrategyPattern", "StrategyPattern\StrategyPattern.csproj", "{73D240B4-428D-4BC1-BC3C-C14D1D9D806E}"
24 | EndProject
25 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "TemplatePattern", "TemplatePattern\TemplatePattern.csproj", "{928CD7B2-BB6E-4E07-834E-67B20CA6D698}"
26 | EndProject
27 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "BridgePattern", "BridgePattern\BridgePattern.csproj", "{95E7F42A-74B9-4071-9A3C-86EF95A0EB1B}"
28 | EndProject
29 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FlyweightPattern", "FlyweightPattern\FlyweightPattern.csproj", "{0067EFC3-FC8D-4F1A-AA92-12323CAD0200}"
30 | EndProject
31 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "VisitorPattern", "VisitorPattern\VisitorPattern.csproj", "{871F7BE0-B75F-4F9E-9C4D-CE9C4ECE7A88}"
32 | EndProject
33 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FactoryPattern", "FactoryPattern\FactoryPattern.csproj", "{182B58DC-6787-4A09-8BCF-87A96737E5A6}"
34 | EndProject
35 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "PrototypePattern", "PrototypePattern\PrototypePattern.csproj", "{2DC00E3D-2099-4C58-B98F-B6B3F285739F}"
36 | EndProject
37 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MediatorPattern", "MediatorPattern\MediatorPattern.csproj", "{82A66FF6-5D66-4E39-8FF8-C8EBA0EB3A2D}"
38 | EndProject
39 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "BuilderPattern", "BuilderPattern\BuilderPattern.csproj", "{274786D8-2E30-40D7-81B5-DFA3872CF9B6}"
40 | EndProject
41 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ProxyPattern", "ProxyPattern\ProxyPattern.csproj", "{0F8297F6-FA4F-44B6-BF99-0FF71ECCF87A}"
42 | EndProject
43 | Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SingletonPattern.Tests", "SingletonPattern.Tests\SingletonPattern.Tests.csproj", "{7A21A074-AEBB-4B33-80BA-D7DFBE87A449}"
44 | EndProject
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53 | EndGlobalSection
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295 | EndGlobalSection
296 | GlobalSection(SolutionProperties) = preSolution
297 | HideSolutionNode = FALSE
298 | EndGlobalSection
299 | GlobalSection(ExtensibilityGlobals) = postSolution
300 | SolutionGuid = {A3449832-9F8D-413F-8336-8EBEEB77353B}
301 | EndGlobalSection
302 | EndGlobal
303 |
--------------------------------------------------------------------------------
/FacadePattern/Dimmer.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace FacadePattern
4 | {
5 | public class Dimmer
6 | {
7 | internal void Dim(int val)
8 | {
9 | Console.WriteLine(val == 10 ? "Turning Lights On" : $"Dimming lights to {val}");
10 | }
11 |
12 | internal void Off() => Console.WriteLine("Switching off lights");
13 | }
14 | }
15 |
--------------------------------------------------------------------------------
/FacadePattern/Dvd.cs:
--------------------------------------------------------------------------------
1 | namespace FacadePattern
2 | {
3 | public class Dvd
4 | {
5 | public Dvd(string name)
6 | {
7 | Movie = name;
8 | }
9 | public string Movie { get; set; }
10 | }
11 | }
--------------------------------------------------------------------------------
/FacadePattern/DvdPlayer.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace FacadePattern
4 | {
5 | public class DvdPlayer
6 | {
7 | private Dvd _dvd;
8 | private int _time = 0;
9 | public void On() => Console.WriteLine("DVD Player powered on");
10 |
11 | public void Insert(Dvd dvd)
12 | {
13 | _dvd = dvd;
14 | Console.WriteLine($"Inserting {dvd.Movie}");
15 |
16 | }
17 |
18 | public void Play() => Console.WriteLine($"Playing {_dvd.Movie}");
19 |
20 | public void Pause()
21 | {
22 | Console.WriteLine($"Pausing at {_time = (new Random()).Next(_time, _time + 120)}");
23 | }
24 |
25 | public void Resume()
26 | {
27 | Console.WriteLine($"Resuming from {_time}");
28 | }
29 | }
30 | }
--------------------------------------------------------------------------------
/FacadePattern/FacadePattern.csproj:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 | Exe
5 | net6.0
6 | enable
7 | enable
8 |
9 |
10 |
11 |
--------------------------------------------------------------------------------
/FacadePattern/HometheaterFacade.cs:
--------------------------------------------------------------------------------
1 | namespace FacadePattern
2 | {
3 | public class HomeTheatreFacade
4 | {
5 | private Dimmer _dimmer;
6 | private Dvd _dvd;
7 | private DvdPlayer _dvdPlayer;
8 |
9 | public HomeTheatreFacade(Dimmer dimmer, Dvd dvd, DvdPlayer dvdPlayer)
10 | {
11 | _dvd = dvd;
12 | _dimmer = dimmer;
13 | _dvdPlayer = dvdPlayer;
14 | }
15 |
16 | public void WatchMovie()
17 | {
18 | _dimmer.Dim(5);
19 | _dvdPlayer.On();
20 | _dvdPlayer.Insert(_dvd);
21 | _dvdPlayer.Play();
22 | }
23 |
24 | public void Pause()
25 | {
26 | _dimmer.Dim(10);
27 | _dvdPlayer.Pause();
28 | }
29 |
30 | public void Resume()
31 | {
32 | _dimmer.Dim(5);
33 | _dvdPlayer.Resume();
34 | }
35 | }
36 | }
--------------------------------------------------------------------------------
/FacadePattern/Program.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace FacadePattern
4 | {
5 | internal static class Program
6 | {
7 | private static void Main()
8 | {
9 | var dimmer = new Dimmer();
10 | var dvdPlayer = new DvdPlayer();
11 | var dvd = new Dvd("Gone with the Wind 2 : Electric Bugaloo");
12 | var homeTheater = new HomeTheatreFacade(dimmer, dvd, dvdPlayer);
13 |
14 | homeTheater.WatchMovie();
15 | Console.WriteLine();
16 | homeTheater.Pause();
17 | Console.WriteLine();
18 | homeTheater.Resume();
19 | Console.WriteLine();
20 | homeTheater.Pause();
21 | }
22 | }
23 | }
24 |
--------------------------------------------------------------------------------
/FactoryPattern/Abstract Factory/ChicagoIngredientsFactory.cs:
--------------------------------------------------------------------------------
1 | using System.Collections.Generic;
2 |
3 | namespace FactoryPattern
4 | {
5 | internal class ChicagoIngredientsFactory : IIngredientsFactory
6 | {
7 | ICheese IIngredientsFactory.CreateCheese()
8 | {
9 | return new Parmesan();
10 | }
11 |
12 | IClam IIngredientsFactory.CreateClam()
13 | {
14 | return new FreshClam();
15 | }
16 |
17 | IDough IIngredientsFactory.CreateDough()
18 | {
19 | return new DeepDish();
20 | }
21 |
22 | ISauce IIngredientsFactory.CreateSauce()
23 | {
24 | return new PlumTomato();
25 | }
26 |
27 | IEnumerable IIngredientsFactory.CreateVeggies()
28 | {
29 | var oni = new Onion();
30 | var ccm = new Cucumber();
31 | var ppr = new Pepper();
32 | IVeggies[] arr = { oni, ccm, ppr };
33 | return arr;
34 | }
35 | }
36 | }
--------------------------------------------------------------------------------
/FactoryPattern/Abstract Factory/IIngredientsFactory.cs:
--------------------------------------------------------------------------------
1 | using System.Collections.Generic;
2 |
3 | namespace FactoryPattern
4 | {
5 | interface IIngredientsFactory
6 | {
7 | IDough CreateDough();
8 | IEnumerable CreateVeggies();
9 | ISauce CreateSauce();
10 | ICheese CreateCheese();
11 | IClam CreateClam();
12 | }
13 | }
14 |
--------------------------------------------------------------------------------
/FactoryPattern/Abstract Factory/Ingredients/CherryTomato.cs:
--------------------------------------------------------------------------------
1 | namespace FactoryPattern
2 | {
3 | internal class CherryTomato : ISauce
4 | {
5 | public string Name => "Cherry Tomato";
6 | }
7 | }
--------------------------------------------------------------------------------
/FactoryPattern/Abstract Factory/Ingredients/Cucumber.cs:
--------------------------------------------------------------------------------
1 | namespace FactoryPattern
2 | {
3 | internal class Cucumber : IVeggies
4 | {
5 | public string Name => "Cucumber";
6 | }
7 | }
--------------------------------------------------------------------------------
/FactoryPattern/Abstract Factory/Ingredients/DeepDish.cs:
--------------------------------------------------------------------------------
1 | namespace FactoryPattern
2 | {
3 | internal class DeepDish : IDough
4 | {
5 | public string Name => "Deep Dish";
6 | }
7 | }
--------------------------------------------------------------------------------
/FactoryPattern/Abstract Factory/Ingredients/FreshClam.cs:
--------------------------------------------------------------------------------
1 | namespace FactoryPattern
2 | {
3 | internal class FreshClam : IClam
4 | {
5 | public string Name => "Fresh Clam";
6 | }
7 | }
--------------------------------------------------------------------------------
/FactoryPattern/Abstract Factory/Ingredients/FrozenClam.cs:
--------------------------------------------------------------------------------
1 | namespace FactoryPattern
2 | {
3 | internal class FrozenClam : IClam
4 | {
5 | public string Name => "Frozen Clam";
6 | }
7 | }
--------------------------------------------------------------------------------
/FactoryPattern/Abstract Factory/Ingredients/Interfaces/ICheese.cs:
--------------------------------------------------------------------------------
1 | namespace FactoryPattern
2 | {
3 | public interface ICheese
4 | {
5 | string Name { get; }
6 | }
7 | }
--------------------------------------------------------------------------------
/FactoryPattern/Abstract Factory/Ingredients/Interfaces/IClam.cs:
--------------------------------------------------------------------------------
1 | namespace FactoryPattern
2 | {
3 | public interface IClam
4 | {
5 | string Name { get; }
6 | }
7 | }
--------------------------------------------------------------------------------
/FactoryPattern/Abstract Factory/Ingredients/Interfaces/IDough.cs:
--------------------------------------------------------------------------------
1 | namespace FactoryPattern
2 | {
3 | public interface IDough
4 | {
5 | string Name { get; }
6 | }
7 | }
--------------------------------------------------------------------------------
/FactoryPattern/Abstract Factory/Ingredients/Interfaces/ISauce.cs:
--------------------------------------------------------------------------------
1 | namespace FactoryPattern
2 | {
3 | public interface ISauce
4 | {
5 | string Name { get; }
6 | }
7 | }
--------------------------------------------------------------------------------
/FactoryPattern/Abstract Factory/Ingredients/Interfaces/IVeggies.cs:
--------------------------------------------------------------------------------
1 | namespace FactoryPattern
2 | {
3 | public interface IVeggies
4 | {
5 | string Name { get; }
6 | }
7 | }
--------------------------------------------------------------------------------
/FactoryPattern/Abstract Factory/Ingredients/Mozarella.cs:
--------------------------------------------------------------------------------
1 | namespace FactoryPattern
2 | {
3 | internal class Mozarella : ICheese
4 | {
5 | public string Name => "Mozarella";
6 | }
7 | }
--------------------------------------------------------------------------------
/FactoryPattern/Abstract Factory/Ingredients/Olive.cs:
--------------------------------------------------------------------------------
1 | namespace FactoryPattern
2 | {
3 | internal class Olive : IVeggies
4 | {
5 | public string Name => "Olives";
6 | }
7 | }
--------------------------------------------------------------------------------
/FactoryPattern/Abstract Factory/Ingredients/Onion.cs:
--------------------------------------------------------------------------------
1 | namespace FactoryPattern
2 | {
3 | internal class Onion : IVeggies
4 | {
5 | public Onion()
6 | {
7 | }
8 |
9 | public string Name => "Onions";
10 | }
11 | }
--------------------------------------------------------------------------------
/FactoryPattern/Abstract Factory/Ingredients/Parmesan.cs:
--------------------------------------------------------------------------------
1 | namespace FactoryPattern
2 | {
3 | internal class Parmesan : ICheese
4 | {
5 | public string Name => "Parmesan";
6 | }
7 | }
--------------------------------------------------------------------------------
/FactoryPattern/Abstract Factory/Ingredients/Pepper.cs:
--------------------------------------------------------------------------------
1 | namespace FactoryPattern
2 | {
3 | internal class Pepper : IVeggies
4 | {
5 |
6 | public string Name => "Bell Peppers";
7 | }
8 | }
--------------------------------------------------------------------------------
/FactoryPattern/Abstract Factory/Ingredients/PlumTomato.cs:
--------------------------------------------------------------------------------
1 | namespace FactoryPattern
2 | {
3 | internal class PlumTomato : ISauce
4 | {
5 | public string Name => "Plum Tomato";
6 | }
7 | }
--------------------------------------------------------------------------------
/FactoryPattern/Abstract Factory/Ingredients/ThinCrust.cs:
--------------------------------------------------------------------------------
1 | namespace FactoryPattern
2 | {
3 | internal class ThinCrust : IDough
4 | {
5 | public string Name => "Thin Crust";
6 | }
7 | }
--------------------------------------------------------------------------------
/FactoryPattern/Abstract Factory/NYIngredientsFactory.cs:
--------------------------------------------------------------------------------
1 | using System.Collections.Generic;
2 |
3 | namespace FactoryPattern
4 | {
5 | internal class NyIngredientsFactory : IIngredientsFactory
6 | {
7 | ICheese IIngredientsFactory.CreateCheese()
8 | {
9 | return new Mozarella();
10 | }
11 |
12 | IClam IIngredientsFactory.CreateClam()
13 | {
14 | return new FrozenClam();
15 | }
16 |
17 | IDough IIngredientsFactory.CreateDough()
18 | {
19 | return new ThinCrust();
20 | }
21 |
22 | ISauce IIngredientsFactory.CreateSauce()
23 | {
24 | return new CherryTomato();
25 | }
26 |
27 | IEnumerable IIngredientsFactory.CreateVeggies()
28 | {
29 | IVeggies[] arr = { new Onion(), new Pepper(), new Olive() };
30 | return arr;
31 | }
32 | }
33 | }
--------------------------------------------------------------------------------
/FactoryPattern/Factory Method/ChicagoPizzaFactory.cs:
--------------------------------------------------------------------------------
1 | namespace FactoryPattern
2 | {
3 | class ChicagoPizzaFactory : PizzaFactory
4 | {
5 | private readonly string chicagoCheese = "Chicago Cheese";
6 | private readonly string chicagoClam = "Chicago Clam";
7 | private readonly string chicagoVeggie = "Chicago Veggie";
8 |
9 | protected override Pizza Create(PizzaType type)
10 | {
11 | Pizza pizza;
12 | IIngredientsFactory ingredients = new ChicagoIngredientsFactory();
13 |
14 | if (type == PizzaType.Cheese)
15 | {
16 | pizza = new CheesePizza(ingredients);
17 | pizza.Name = chicagoCheese;
18 | }
19 | else if (type == PizzaType.Clam)
20 | {
21 | pizza = new ClamPizza(ingredients);
22 | pizza.Name = chicagoClam;
23 | }
24 | else
25 | {
26 | pizza = new VeggiePizza(ingredients);
27 | pizza.Name = chicagoVeggie;
28 | }
29 | pizza.Color = "red";
30 | return pizza;
31 | }
32 | }
33 | }
34 |
--------------------------------------------------------------------------------
/FactoryPattern/Factory Method/NYPizzaFactory.cs:
--------------------------------------------------------------------------------
1 | namespace FactoryPattern
2 | {
3 | class NyPizzaFactory : PizzaFactory
4 | {
5 | private readonly string nyStyleCheese = "NY Style Cheese";
6 | private readonly string nyStyleClam = "NY Style Clam";
7 | private readonly string nyStyleVeggie = "NY Style Veggie";
8 |
9 | protected override Pizza Create(PizzaType type)
10 | {
11 | Pizza pizza;
12 | IIngredientsFactory ingredients = new NyIngredientsFactory();
13 |
14 | if (type == PizzaType.Cheese)
15 | {
16 | pizza = new CheesePizza(ingredients) { Name = nyStyleCheese };
17 | }
18 | else if (type == PizzaType.Clam)
19 | {
20 | pizza = new ClamPizza(ingredients) { Name = nyStyleClam };
21 | }
22 | else
23 | {
24 | pizza = new VeggiePizza(ingredients) { Name = nyStyleVeggie };
25 | }
26 | pizza.Color = "blue";
27 | return pizza;
28 | }
29 | }
30 | }
31 |
--------------------------------------------------------------------------------
/FactoryPattern/Factory Method/PizzaFactory.cs:
--------------------------------------------------------------------------------
1 | namespace FactoryPattern
2 | {
3 | abstract class PizzaFactory
4 | {
5 | public Pizza Order(PizzaType type)
6 | {
7 | var pizza = Create(type);
8 | pizza.Prepare();
9 | pizza.Bake();
10 | pizza.Cut();
11 | pizza.Box();
12 | return pizza;
13 | }
14 |
15 | protected abstract Pizza Create(PizzaType type);
16 | }
17 | }
18 |
--------------------------------------------------------------------------------
/FactoryPattern/FactoryPattern.csproj:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 | Exe
5 | net6.0
6 | enable
7 | enable
8 |
9 |
10 |
11 |
--------------------------------------------------------------------------------
/FactoryPattern/Helper.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 FactoryPattern
8 | {
9 | internal class Helper
10 | {
11 | }
12 |
13 | internal enum PizzaType
14 | {
15 | Cheese,
16 | Clam
17 | }
18 | }
19 |
--------------------------------------------------------------------------------
/FactoryPattern/Pizza/CheesePizza.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace FactoryPattern
4 | {
5 | class CheesePizza : Pizza
6 | {
7 | readonly IIngredientsFactory _ingredients;
8 |
9 | public CheesePizza(IIngredientsFactory ing)
10 | {
11 | _ingredients = ing;
12 | }
13 | internal override void Prepare()
14 | {
15 | Console.WriteLine("Preparing " + Name + " Using");
16 | Console.Write("Dough: " + _ingredients.CreateDough().Name + ", Cheese: " + _ingredients.CreateCheese().Name + ", Sauce: " + _ingredients.CreateSauce().Name + ", Veggies: ");
17 | Console.WriteLine();
18 | foreach (var val in _ingredients.CreateVeggies())
19 | {
20 | Console.Write(val.Name + " ");
21 | }
22 | Console.WriteLine();
23 | }
24 | }
25 | }
26 |
--------------------------------------------------------------------------------
/FactoryPattern/Pizza/ClamPizza.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace FactoryPattern
4 | {
5 | class ClamPizza : Pizza
6 | {
7 | readonly IIngredientsFactory _ingredients;
8 |
9 | public ClamPizza(IIngredientsFactory ing)
10 | {
11 | _ingredients = ing;
12 | }
13 |
14 | internal override void Prepare()
15 | {
16 | Console.WriteLine("Preparing " + Name + " Using");
17 | Console.Write("Dough: " + _ingredients.CreateDough().Name + ", Clam: " + _ingredients.CreateClam().Name + ", Sauce: " + _ingredients.CreateSauce().Name + ", Cheese: " + _ingredients.CreateCheese().Name);
18 | Console.WriteLine();
19 |
20 | }
21 | }
22 | }
23 |
--------------------------------------------------------------------------------
/FactoryPattern/Pizza/Pizza.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace FactoryPattern
4 | {
5 | abstract class Pizza
6 | {
7 | public string Color;
8 |
9 | internal abstract void Prepare();
10 | internal void Bake()
11 | {
12 | Console.WriteLine("Baking at 135 degree Celsius for 20 minutes");
13 | }
14 | internal void Cut()
15 | {
16 | Console.WriteLine("Cutting into diagonal pieces");
17 | }
18 | internal void Box()
19 | {
20 | Console.WriteLine("Putting pizza in " + Color + " coloured box");
21 | }
22 |
23 | public string Name { protected get; set; }
24 |
25 | }
26 | }
27 |
--------------------------------------------------------------------------------
/FactoryPattern/Pizza/VeggiePizza.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace FactoryPattern
4 | {
5 | class VeggiePizza : Pizza
6 | {
7 | readonly IIngredientsFactory _ingredients;
8 |
9 | public VeggiePizza(IIngredientsFactory ing)
10 | {
11 | _ingredients = ing;
12 | }
13 | internal override void Prepare()
14 | {
15 | Console.WriteLine("Preparing " + Name + " Using");
16 | Console.Write("Dough: " + _ingredients.CreateDough().Name + ", Cheese: " + _ingredients.CreateCheese().Name + ", Sauce: " + _ingredients.CreateSauce().Name + ", Veggies: ");
17 | Console.WriteLine();
18 | foreach (var val in _ingredients.CreateVeggies())
19 | {
20 | Console.Write(val.Name + " ");
21 | }
22 | Console.WriteLine();
23 | }
24 | }
25 | }
26 |
--------------------------------------------------------------------------------
/FactoryPattern/Program.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace FactoryPattern
4 | {
5 | static class Program
6 | {
7 | static void Main()
8 | {
9 | Console.WriteLine("Yankees fan orders:");
10 | var yankees = new NyPizzaFactory();
11 | yankees.Order(PizzaType.Cheese);
12 | Console.WriteLine();
13 | Console.WriteLine("Cubs fan orders:");
14 | var cubs = new ChicagoPizzaFactory();
15 | cubs.Order(PizzaType.Clam);
16 | }
17 | }
18 | }
--------------------------------------------------------------------------------
/FlyweightPattern/BeverageFlyweightFactory.cs:
--------------------------------------------------------------------------------
1 | using System;
2 | using System.Collections.Generic;
3 |
4 | namespace FlyweightPattern
5 | {
6 | public class BeverageFlyweightFactory
7 | {
8 | private readonly Dictionary _beverages;
9 |
10 | public BeverageFlyweightFactory()
11 | {
12 | _beverages = new Dictionary();
13 | }
14 |
15 | public IBeverage MakeBeverage(BeverageType type)
16 | {
17 | _beverages.TryGetValue(type, out var beverage);
18 | if (beverage == null)
19 | {
20 | switch (type)
21 | {
22 | case BeverageType.BubbleMilk:
23 | beverage = new BubbleMilkTea();
24 | _beverages.Add(BeverageType.BubbleMilk, beverage);
25 | break;
26 | case BeverageType.FoamMilk:
27 | beverage = new FoamMilkTea();
28 | _beverages.Add(BeverageType.FoamMilk, beverage);
29 | break;
30 | case BeverageType.OolongMilk:
31 | beverage = new OolingMilkTea();
32 | _beverages.Add(BeverageType.OolongMilk, beverage);
33 | break;
34 | case BeverageType.CoconutMilk:
35 | beverage = new CoconutMilkTea();
36 | _beverages.Add(BeverageType.CoconutMilk, beverage);
37 | break;
38 | default:
39 | throw new ArgumentOutOfRangeException(nameof(type), type, null);
40 | }
41 | }
42 |
43 | return beverage;
44 | }
45 | }
46 | }
--------------------------------------------------------------------------------
/FlyweightPattern/BeverageType.cs:
--------------------------------------------------------------------------------
1 | namespace FlyweightPattern
2 | {
3 | public enum BeverageType
4 | {
5 | BubbleMilk, FoamMilk, OolongMilk, CoconutMilk
6 | }
7 | }
--------------------------------------------------------------------------------
/FlyweightPattern/BubbleMilkTea.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace FlyweightPattern
4 | {
5 | public class BubbleMilkTea : IBeverage
6 | {
7 | public BubbleMilkTea()
8 | {
9 | Console.WriteLine("Initializing a Bubble Milk Tea instance");
10 | }
11 |
12 | public void Drink()
13 | {
14 | Console.WriteLine("hmmm... this is bubble milk tea");
15 | }
16 | }
17 | }
--------------------------------------------------------------------------------
/FlyweightPattern/BubbleTeaShop.cs:
--------------------------------------------------------------------------------
1 | using System;
2 | using System.Collections.Generic;
3 |
4 | namespace FlyweightPattern
5 | {
6 | public class BubbleTeaShop
7 | {
8 | private List takeAwayOrders;
9 |
10 | public BubbleTeaShop()
11 | {
12 | takeAwayOrders = new List();
13 | TakeOrders();
14 | }
15 |
16 | private void TakeOrders()
17 | {
18 | var factory = new BeverageFlyweightFactory();
19 |
20 | takeAwayOrders.Add(factory.MakeBeverage(BeverageType.BubbleMilk));
21 | takeAwayOrders.Add(factory.MakeBeverage(BeverageType.BubbleMilk));
22 | takeAwayOrders.Add(factory.MakeBeverage(BeverageType.CoconutMilk));
23 | takeAwayOrders.Add(factory.MakeBeverage(BeverageType.FoamMilk));
24 | takeAwayOrders.Add(factory.MakeBeverage(BeverageType.OolongMilk));
25 | takeAwayOrders.Add(factory.MakeBeverage(BeverageType.OolongMilk));
26 | }
27 |
28 | public void Enumerate()
29 | {
30 | Console.WriteLine("Enumerating take away orders\n");
31 | foreach (var beverage in takeAwayOrders)
32 | {
33 | beverage.Drink();
34 | }
35 | }
36 | }
37 | }
--------------------------------------------------------------------------------
/FlyweightPattern/CoconutMilkTea.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace FlyweightPattern
4 | {
5 | public class CoconutMilkTea : IBeverage
6 | {
7 | public CoconutMilkTea()
8 | {
9 | Console.WriteLine("Initializing a Coconut Milk Tea instance");
10 | }
11 |
12 | public void Drink()
13 | {
14 | Console.WriteLine("hmmm... this is coconut milk tea");
15 | }
16 | }
17 | }
--------------------------------------------------------------------------------
/FlyweightPattern/FlyweightPattern.csproj:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 | Exe
5 | net6.0
6 | enable
7 | enable
8 |
9 |
10 |
11 |
--------------------------------------------------------------------------------
/FlyweightPattern/FoamMilkTea.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace FlyweightPattern
4 | {
5 | public class FoamMilkTea : IBeverage
6 | {
7 |
8 | public FoamMilkTea()
9 | {
10 | Console.WriteLine("Initializing a Foam Milk Tea instance");
11 | }
12 |
13 | public void Drink()
14 | {
15 | Console.WriteLine("hmmm... this is foam milk tea");
16 | }
17 | }
18 | }
--------------------------------------------------------------------------------
/FlyweightPattern/IBeverage.cs:
--------------------------------------------------------------------------------
1 | namespace FlyweightPattern
2 | {
3 | public interface IBeverage
4 | {
5 | void Drink();
6 | }
7 | }
--------------------------------------------------------------------------------
/FlyweightPattern/OolingMilkTea.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace FlyweightPattern
4 | {
5 | public class OolingMilkTea : IBeverage
6 | {
7 |
8 | public OolingMilkTea()
9 | {
10 | Console.WriteLine("Initializing an Oolong Milk Tea instance");
11 | }
12 |
13 | public void Drink()
14 | {
15 | Console.WriteLine("hmmm... this is oolong milk tea");
16 | }
17 | }
18 | }
--------------------------------------------------------------------------------
/FlyweightPattern/Program.cs:
--------------------------------------------------------------------------------
1 | namespace FlyweightPattern
2 | {
3 | static class Program
4 | {
5 | private static void Main()
6 | {
7 | var teaShop = new BubbleTeaShop();
8 | teaShop.Enumerate();
9 | }
10 | }
11 | }
--------------------------------------------------------------------------------
/IteratorPattern/BreakfastMenu.cs:
--------------------------------------------------------------------------------
1 | using System.Collections;
2 |
3 | namespace IteratorPattern
4 | {
5 | public class BreakfastMenu
6 | {
7 | private ArrayList _items;
8 |
9 | public IEnumerable Items
10 | {
11 | get
12 | {
13 | return new BreakfastMenuIterator(_items);
14 | }
15 | }
16 |
17 | public BreakfastMenu()
18 | {
19 | _items = new ArrayList();
20 |
21 | AddItem("Waffle", "Blueberry Sauce topped breakfast Waffles", 125, false);
22 | AddItem("Sandwich", "Veggie Sandwich with tomato and cucumber", 75, true);
23 | AddItem("Pankcakes", "Maple syrup Pancakes", 110, false);
24 | AddItem("Corn Flakes", "Cornflakes with fruits and nuts", 60, true);
25 | }
26 |
27 | private void AddItem(string name, string description, int price, bool veg)
28 | {
29 | var item = new Menu(name, description, price, veg);
30 | _items.Add(item);
31 | }
32 |
33 |
34 | }
35 | }
--------------------------------------------------------------------------------
/IteratorPattern/BreakfastMenuEnum.cs:
--------------------------------------------------------------------------------
1 | using System;
2 | using System.Collections;
3 |
4 | namespace IteratorPattern
5 | {
6 | public class BreakfastMenuEnum : IEnumerator
7 | {
8 | private readonly ArrayList _items;
9 | private int _position = -1;
10 |
11 | public BreakfastMenuEnum(ArrayList items)
12 | {
13 | _items = items;
14 | }
15 |
16 | public void Dispose()
17 | {
18 | throw new System.NotImplementedException();
19 | }
20 |
21 | public bool MoveNext()
22 | {
23 | _position++;
24 | return (_position < _items.Count);
25 | }
26 |
27 | public void Reset()
28 | {
29 | _position = -1;
30 | }
31 |
32 | object IEnumerator.Current => Current;
33 |
34 | public Menu Current
35 | {
36 | get
37 | {
38 | try
39 | {
40 | return (Menu)_items[_position];
41 | }
42 | catch (IndexOutOfRangeException)
43 | {
44 | throw new InvalidOperationException();
45 | }
46 | }
47 | }
48 | }
49 | }
--------------------------------------------------------------------------------
/IteratorPattern/BreakfastMenuIterator.cs:
--------------------------------------------------------------------------------
1 | using System.Collections;
2 |
3 | namespace IteratorPattern
4 | {
5 | class BreakfastMenuIterator : IEnumerable
6 | {
7 | private int _count = 0;
8 | private ArrayList _items;
9 |
10 | public BreakfastMenuIterator(ArrayList items)
11 | {
12 | _items = items;
13 | }
14 |
15 | IEnumerator IEnumerable.GetEnumerator()
16 | {
17 | return GetEnumerator();
18 | }
19 |
20 | public IEnumerator GetEnumerator()
21 | {
22 | return new BreakfastMenuEnum(_items);
23 | }
24 | }
25 | }
26 |
--------------------------------------------------------------------------------
/IteratorPattern/Client.cs:
--------------------------------------------------------------------------------
1 | using System;
2 | using System.Collections;
3 |
4 | namespace IteratorPattern
5 | {
6 | public class Client
7 | {
8 | private IEnumerable _breakfast;
9 | private IEnumerable _dinner;
10 |
11 | public Client(BreakfastMenu breakfast, DinnerMenu dinner)
12 | {
13 | this._breakfast = breakfast.Items;
14 | this._dinner = dinner.Items;
15 | }
16 |
17 | public void PrintMenu()
18 | {
19 | var breakfast = _breakfast;
20 | PrintMenu(breakfast);
21 | var dinner = _dinner;
22 | PrintMenu(dinner);
23 | }
24 |
25 | private void PrintMenu(IEnumerable iter)
26 | {
27 | foreach (var item in iter)
28 | {
29 | var i = (Menu)item;
30 | Console.WriteLine($"{i.Name} Rs. {i.Price} { (i.Vegetarian ? "*" : "x") } \n {i.Description} ");
31 |
32 | }
33 | }
34 | }
35 | }
--------------------------------------------------------------------------------
/IteratorPattern/DinnerMenu.cs:
--------------------------------------------------------------------------------
1 | using System;
2 | using System.Collections;
3 |
4 | namespace IteratorPattern
5 | {
6 | public class DinnerMenu
7 | {
8 | private const int Max = 1;
9 |
10 | private int _count;
11 | private Menu[] _items;
12 |
13 | public IEnumerable Items
14 | {
15 | get
16 | {
17 | return new DinnerMenuIterator(_items);
18 | }
19 | }
20 |
21 | public DinnerMenu()
22 | {
23 | _items = new Menu[Max];
24 |
25 | AddItems("Hamburger", "Hamburger with cheese and onions", 160, false);
26 |
27 | }
28 |
29 | private void AddItems(string name, string description, int price, bool veg)
30 | {
31 | var item = new Menu(name, description, price, veg);
32 |
33 | if (_count <= Max)
34 | {
35 | _items[_count] = item;
36 | _count++;
37 | }
38 | else
39 | {
40 | throw new IndexOutOfRangeException();
41 | }
42 | }
43 | }
44 | }
--------------------------------------------------------------------------------
/IteratorPattern/DinnerMenuEnum.cs:
--------------------------------------------------------------------------------
1 | using System;
2 | using System.Collections;
3 |
4 | namespace IteratorPattern
5 | {
6 | public class DinnerMenuEnum : IEnumerator
7 | {
8 | private readonly Menu[] _items;
9 | private int _position = -1;
10 | public DinnerMenuEnum(Menu[] items)
11 | {
12 | _items = items;
13 | }
14 |
15 | public void Dispose()
16 | {
17 | throw new System.NotImplementedException();
18 | }
19 |
20 | public bool MoveNext()
21 | {
22 | _position++;
23 | return (_position < _items.Length);
24 | }
25 |
26 | public void Reset()
27 | {
28 | _position = -1;
29 | }
30 |
31 | object IEnumerator.Current => Current;
32 |
33 | public Menu Current
34 | {
35 | get
36 | {
37 | try
38 | {
39 | return _items[_position];
40 | }
41 | catch (IndexOutOfRangeException)
42 | {
43 | throw new InvalidOperationException();
44 | }
45 | }
46 | }
47 | }
48 | }
--------------------------------------------------------------------------------
/IteratorPattern/DinnerMenuIterator.cs:
--------------------------------------------------------------------------------
1 | using System.Collections;
2 |
3 | namespace IteratorPattern
4 | {
5 | class DinnerMenuIterator : IEnumerable
6 | {
7 | private int _count = 0;
8 | private Menu[] _items;
9 |
10 | public DinnerMenuIterator(Menu[] items)
11 | {
12 | _items = items;
13 | }
14 |
15 | IEnumerator IEnumerable.GetEnumerator()
16 | {
17 | return GetEnumerator();
18 | }
19 |
20 | public IEnumerator GetEnumerator()
21 | {
22 | return new DinnerMenuEnum(_items);
23 | }
24 | }
25 | }
26 |
--------------------------------------------------------------------------------
/IteratorPattern/IteratorPattern.csproj:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 | Exe
5 | net6.0
6 | enable
7 | enable
8 |
9 |
10 |
11 |
--------------------------------------------------------------------------------
/IteratorPattern/Menu.cs:
--------------------------------------------------------------------------------
1 | namespace IteratorPattern
2 | {
3 | public class Menu
4 | {
5 | public string Name { get; }
6 | public string Description { get; }
7 | public bool Vegetarian { get; }
8 | public double Price { get; }
9 |
10 | public Menu(string name, string description, double price, bool vegetarian)
11 | {
12 | Name = name;
13 | Description = description;
14 | Price = price;
15 | Vegetarian = vegetarian;
16 | }
17 |
18 | }
19 | }
--------------------------------------------------------------------------------
/IteratorPattern/Program.cs:
--------------------------------------------------------------------------------
1 | namespace IteratorPattern
2 | {
3 | static class Program
4 | {
5 | private static void Main()
6 | {
7 | var breakfast = new BreakfastMenu();
8 | var dinner = new DinnerMenu();
9 | var waiter = new Client(breakfast, dinner);
10 | waiter.PrintMenu();
11 | }
12 | }
13 | }
14 |
--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
1 | GNU GENERAL PUBLIC LICENSE
2 | Version 3, 29 June 2007
3 |
4 | Copyright (C) 2007 Free Software Foundation, Inc.
5 | Everyone is permitted to copy and distribute verbatim copies
6 | of this license document, but changing it is not allowed.
7 |
8 | Preamble
9 |
10 | The GNU General Public License is a free, copyleft license for
11 | software and other kinds of works.
12 |
13 | The licenses for most software and other practical works are designed
14 | to take away your freedom to share and change the works. By contrast,
15 | the GNU General Public License is intended to guarantee your freedom to
16 | share and change all versions of a program--to make sure it remains free
17 | software for all its users. We, the Free Software Foundation, use the
18 | GNU General Public License for most of our software; it applies also to
19 | any other work released this way by its authors. You can apply it to
20 | your programs, too.
21 |
22 | When we speak of free software, we are referring to freedom, not
23 | price. Our General Public Licenses are designed to make sure that you
24 | have the freedom to distribute copies of free software (and charge for
25 | them if you wish), that you receive source code or can get it if you
26 | want it, that you can change the software or use pieces of it in new
27 | free programs, and that you know you can do these things.
28 |
29 | To protect your rights, we need to prevent others from denying you
30 | these rights or asking you to surrender the rights. Therefore, you have
31 | certain responsibilities if you distribute copies of the software, or if
32 | you modify it: responsibilities to respect the freedom of others.
33 |
34 | For example, if you distribute copies of such a program, whether
35 | gratis or for a fee, you must pass on to the recipients the same
36 | freedoms that you received. You must make sure that they, too, receive
37 | or can get the source code. And you must show them these terms so they
38 | know their rights.
39 |
40 | Developers that use the GNU GPL protect your rights with two steps:
41 | (1) assert copyright on the software, and (2) offer you this License
42 | giving you legal permission to copy, distribute and/or modify it.
43 |
44 | For the developers' and authors' protection, the GPL clearly explains
45 | that there is no warranty for this free software. For both users' and
46 | authors' sake, the GPL requires that modified versions be marked as
47 | changed, so that their problems will not be attributed erroneously to
48 | authors of previous versions.
49 |
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51 | modified versions of the software inside them, although the manufacturer
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60 |
61 | Finally, every program is threatened constantly by software patents.
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68 | The precise terms and conditions for copying, distribution and
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70 |
71 | TERMS AND CONDITIONS
72 |
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74 |
75 | "This License" refers to version 3 of the GNU General Public License.
76 |
77 | "Copyright" also means copyright-like laws that apply to other kinds of
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471 | 11. Patents.
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535 |
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539 |
540 | 12. No Surrender of Others' Freedom.
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611 |
612 | 17. Interpretation of Sections 15 and 16.
613 |
614 | If the disclaimer of warranty and limitation of liability provided
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620 |
621 | END OF TERMS AND CONDITIONS
622 |
623 | How to Apply These Terms to Your New Programs
624 |
625 | If you develop a new program, and you want it to be of the greatest
626 | possible use to the public, the best way to achieve this is to make it
627 | free software which everyone can redistribute and change under these terms.
628 |
629 | To do so, attach the following notices to the program. It is safest
630 | to attach them to the start of each source file to most effectively
631 | state the exclusion of warranty; and each file should have at least
632 | the "copyright" line and a pointer to where the full notice is found.
633 |
634 | {one line to give the program's name and a brief idea of what it does.}
635 | Copyright (C) {year} {name of author}
636 |
637 | This program is free software: you can redistribute it and/or modify
638 | it under the terms of the GNU General Public License as published by
639 | the Free Software Foundation, either version 3 of the License, or
640 | (at your option) any later version.
641 |
642 | This program is distributed in the hope that it will be useful,
643 | but WITHOUT ANY WARRANTY; without even the implied warranty of
644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
645 | GNU General Public License for more details.
646 |
647 | You should have received a copy of the GNU General Public License
648 | along with this program. If not, see .
649 |
650 | Also add information on how to contact you by electronic and paper mail.
651 |
652 | If the program does terminal interaction, make it output a short
653 | notice like this when it starts in an interactive mode:
654 |
655 | {project} Copyright (C) {year} {fullname}
656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
657 | This is free software, and you are welcome to redistribute it
658 | under certain conditions; type `show c' for details.
659 |
660 | The hypothetical commands `show w' and `show c' should show the appropriate
661 | parts of the General Public License. Of course, your program's commands
662 | might be different; for a GUI interface, you would use an "about box".
663 |
664 | You should also get your employer (if you work as a programmer) or school,
665 | if any, to sign a "copyright disclaimer" for the program, if necessary.
666 | For more information on this, and how to apply and follow the GNU GPL, see
667 | .
668 |
669 | The GNU General Public License does not permit incorporating your program
670 | into proprietary programs. If your program is a subroutine library, you
671 | may consider it more useful to permit linking proprietary applications with
672 | the library. If this is what you want to do, use the GNU Lesser General
673 | Public License instead of this License. But first, please read
674 | .
675 |
--------------------------------------------------------------------------------
/MediatorPattern/Colleague.cs:
--------------------------------------------------------------------------------
1 | namespace MediatorPattern
2 | {
3 | abstract class Colleague
4 | {
5 | protected Mediator mediator;
6 |
7 | public Colleague(Mediator mediator) => this.mediator = mediator;
8 |
9 | public virtual void Send(string message) => this.mediator.Send(message, this);
10 |
11 | public abstract void Notify(string message);
12 |
13 | }
14 | }
--------------------------------------------------------------------------------
/MediatorPattern/Customer.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace MediatorPattern
4 | {
5 | class Customer : Colleague
6 | {
7 | public Customer(Mediator mediator) : base(mediator) { }
8 |
9 | public override void Notify(string message)
10 | {
11 | Console.WriteLine($"Message to customer: {message}");
12 | }
13 | }
14 | }
--------------------------------------------------------------------------------
/MediatorPattern/ManagerMediator.cs:
--------------------------------------------------------------------------------
1 | namespace MediatorPattern
2 | {
3 | class ManagerMediator : Mediator
4 | {
5 | public Colleague Customer { get; set; }
6 | public Colleague Programmer { get; set; }
7 | public Colleague Tester { get; set; }
8 |
9 | public override void Send(string message, Colleague colleague)
10 | {
11 | if (colleague == Customer)
12 | {
13 | Programmer.Notify(message);
14 | }
15 | else if (colleague == Programmer)
16 | {
17 | Tester.Notify(message);
18 | }
19 | else Customer.Notify(message);
20 | }
21 | }
22 | }
--------------------------------------------------------------------------------
/MediatorPattern/Mediator.cs:
--------------------------------------------------------------------------------
1 | namespace MediatorPattern
2 | {
3 | abstract class Mediator
4 | {
5 | public abstract void Send(string message, Colleague colleague);
6 | }
7 | }
--------------------------------------------------------------------------------
/MediatorPattern/MediatorPattern.csproj:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 | Exe
5 | net6.0
6 | enable
7 | enable
8 |
9 |
10 |
11 |
--------------------------------------------------------------------------------
/MediatorPattern/Program.cs:
--------------------------------------------------------------------------------
1 | namespace MediatorPattern
2 | {
3 | class Program
4 | {
5 | static void Main(string[] args)
6 | {
7 | var mediator = new ManagerMediator();
8 | var customer = new Customer(mediator);
9 | var programmer = new Programmer(mediator);
10 | var tester = new Tester(mediator);
11 | mediator.Customer = customer;
12 | mediator.Programmer = programmer;
13 | mediator.Tester = tester;
14 | customer.Send("We have an order, need to make a program");
15 | programmer.Send("I have done program, need to test it");
16 | tester.Send("I have done testing, here is ready program for you");
17 | }
18 | }
19 | }
--------------------------------------------------------------------------------
/MediatorPattern/Programmer.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace MediatorPattern
4 | {
5 | class Programmer : Colleague
6 | {
7 | public Programmer(Mediator mediator) : base(mediator) { }
8 |
9 | public override void Notify(string message)
10 | {
11 | Console.WriteLine($"Message to programmer: {message}");
12 | }
13 | }
14 | }
--------------------------------------------------------------------------------
/MediatorPattern/Tester.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace MediatorPattern
4 | {
5 | class Tester : Colleague
6 | {
7 | public Tester(Mediator mediator) : base(mediator) { }
8 |
9 | public override void Notify(string message)
10 | {
11 | Console.WriteLine($"Message to tester: {message}");
12 | }
13 | }
14 | }
--------------------------------------------------------------------------------
/ObserverPattern/ObserverPattern.csproj:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 | Exe
5 | net6.0
6 | enable
7 | enable
8 |
9 |
10 |
11 |
--------------------------------------------------------------------------------
/ObserverPattern/Program.cs:
--------------------------------------------------------------------------------
1 | namespace ObserverPattern
2 | {
3 | static class Program
4 | {
5 | static void Main()
6 | {
7 | var provider = new WeatherSupplier();
8 | var observer1 = new WeatherMonitor("TP");
9 | var observer2 = new WeatherMonitor("H");
10 | provider.WeatherConditions(32.0, 0.05, 1.5);
11 | observer1.Subscribe(provider);
12 | provider.WeatherConditions(33.5, 0.04, 1.7);
13 | observer2.Subscribe(provider);
14 | provider.WeatherConditions(37.5, 0.07, 1.2);
15 |
16 |
17 | }
18 | }
19 | }
20 |
--------------------------------------------------------------------------------
/ObserverPattern/Unsubscriber.cs:
--------------------------------------------------------------------------------
1 | using System;
2 | using System.Collections.Generic;
3 |
4 | namespace ObserverPattern
5 | {
6 | internal class Unsubscriber : IDisposable
7 | {
8 | private readonly List> _observers;
9 | private readonly IObserver _observer;
10 |
11 | internal Unsubscriber(List> observers, IObserver observer)
12 | {
13 | _observers = observers;
14 | _observer = observer;
15 | }
16 |
17 | public void Dispose()
18 | {
19 | if (_observers.Contains(_observer))
20 | _observers.Remove(_observer);
21 | }
22 | }
23 | }
24 |
--------------------------------------------------------------------------------
/ObserverPattern/Weather.cs:
--------------------------------------------------------------------------------
1 | namespace ObserverPattern
2 | {
3 | class Weather
4 | {
5 | public double Pressure { get; }
6 |
7 | public double Humidity { get; }
8 |
9 | public double Temperature { get; }
10 |
11 | public Weather(double humd, double pres, double temp)
12 | {
13 | Temperature = temp;
14 | Pressure = pres;
15 | Humidity = humd;
16 | }
17 | }
18 | }
19 |
--------------------------------------------------------------------------------
/ObserverPattern/WeatherMonitor.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace ObserverPattern
4 | {
5 | sealed class WeatherMonitor : IObserver
6 | {
7 | private IDisposable _cancellation;
8 | private readonly string _name;
9 |
10 | public void Subscribe(WeatherSupplier provider)
11 | {
12 | _cancellation = provider.Subscribe(this);
13 | }
14 |
15 | public void Unsubscribe()
16 | {
17 | _cancellation.Dispose();
18 | }
19 |
20 | public WeatherMonitor(string name)
21 | {
22 | _name = name;
23 | }
24 |
25 | public void OnCompleted()
26 | {
27 | throw new NotImplementedException();
28 | }
29 |
30 | public void OnError(Exception error)
31 | {
32 | Console.WriteLine("Error has occured");
33 | }
34 |
35 | public void OnNext(Weather value)
36 | {
37 | Console.WriteLine(_name);
38 | if (_name.Contains("T"))
39 | {
40 | string op = $"| Temperature : {value.Temperature} Celsius |";
41 | Console.Write(op);
42 |
43 | }
44 | if (_name.Contains("P"))
45 | {
46 | string op = $"| Pressure : {value.Pressure} atm |";
47 | Console.Write(op);
48 | }
49 | if (_name.Contains("H"))
50 | {
51 | string op = $"| Humidity : {value.Humidity * 100} % |";
52 | Console.Write(op);
53 | }
54 | if (!(_name.Contains("T") || _name.Contains("P") || _name.Contains("H")))
55 | {
56 | OnError(new Exception());
57 | }
58 | Console.WriteLine();
59 | }
60 | }
61 | }
62 |
--------------------------------------------------------------------------------
/ObserverPattern/WeatherSupplier.cs:
--------------------------------------------------------------------------------
1 | using System;
2 | using System.Collections.Generic;
3 |
4 | namespace ObserverPattern
5 | {
6 | class WeatherSupplier : IObservable
7 | {
8 | private readonly List> _observers;
9 | private List Screens { get; }
10 |
11 | private List GetScreens()
12 | {
13 | return Screens;
14 | }
15 |
16 | public WeatherSupplier()
17 | {
18 | _observers = new List>();
19 | Screens = new List();
20 | }
21 |
22 | public IDisposable Subscribe(IObserver observer)
23 | {
24 | if (!_observers.Contains(observer))
25 | {
26 | _observers.Add(observer);
27 | foreach (var item in GetScreens())
28 | {
29 | observer.OnNext(item);
30 | }
31 | }
32 | return new Unsubscriber(_observers, observer);
33 | }
34 |
35 | public void WeatherConditions(double temp = 0, double humd = 0, double pres = 0)
36 | {
37 | var conditions = new Weather(humd, pres, temp);
38 | foreach (var item in _observers)
39 | item.OnNext(conditions);
40 | }
41 | }
42 | }
43 |
--------------------------------------------------------------------------------
/PrototypePattern/Circle.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace PrototypePattern
4 | {
5 | class Circle : IFigure
6 | {
7 | readonly int _radius;
8 | public Circle(int r)
9 | {
10 | _radius = r;
11 | }
12 |
13 | public object Clone()
14 | {
15 | return new Circle(_radius);
16 | }
17 | public void GetInfo()
18 | {
19 | Console.WriteLine($"Circle with radius {_radius}");
20 | }
21 | }
22 | }
--------------------------------------------------------------------------------
/PrototypePattern/IFigure.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace PrototypePattern
4 | {
5 | interface IFigure : ICloneable
6 | {
7 | void GetInfo();
8 | }
9 | }
--------------------------------------------------------------------------------
/PrototypePattern/Program.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace PrototypePattern
4 | {
5 | class Program
6 | {
7 | static void Main(string[] args)
8 | {
9 | IFigure figure = new Rectangle(30, 40);
10 | IFigure clonedFigure = (IFigure)figure.Clone();
11 | figure.GetInfo();
12 | clonedFigure.GetInfo();
13 |
14 | figure = new Circle(30);
15 | clonedFigure = (IFigure)figure.Clone();
16 | figure.GetInfo();
17 | clonedFigure.GetInfo();
18 |
19 | Console.Read();
20 | }
21 | }
22 | }
23 |
--------------------------------------------------------------------------------
/PrototypePattern/PrototypePattern.csproj:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 | Exe
5 | net6.0
6 | enable
7 | enable
8 |
9 |
10 |
11 |
--------------------------------------------------------------------------------
/PrototypePattern/Rectangle.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace PrototypePattern
4 | {
5 | class Rectangle : IFigure
6 | {
7 | readonly int _width;
8 | readonly int _height;
9 | public Rectangle(int w, int h)
10 | {
11 | _width = w;
12 | _height = h;
13 | }
14 |
15 | public object Clone()
16 | {
17 | return new Rectangle(_width, _height);
18 | }
19 | public void GetInfo()
20 | {
21 | Console.WriteLine($"Rectangle height {_height} and width {_width}");
22 | }
23 | }
24 | }
--------------------------------------------------------------------------------
/ProxyPattern/Image.cs:
--------------------------------------------------------------------------------
1 | namespace ProxyPattern
2 | {
3 | public interface Image
4 | {
5 | void display();
6 |
7 | }
8 | }
9 |
--------------------------------------------------------------------------------
/ProxyPattern/Program.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace ProxyPattern
4 | {
5 | class Program
6 | {
7 | static void Main(string[] args)
8 | {
9 | Image image = new ProxyImage("testImage.jpg");
10 |
11 | //image will be loaded from disk
12 | image.display();
13 | Console.WriteLine("");
14 |
15 | //image will not be loaded from disk
16 | image.display();
17 | }
18 | }
19 | }
20 |
--------------------------------------------------------------------------------
/ProxyPattern/ProxyImage.cs:
--------------------------------------------------------------------------------
1 | namespace ProxyPattern
2 | {
3 | public class ProxyImage : Image
4 | {
5 | private RealImage _realImage;
6 | private string _fileName;
7 |
8 | public ProxyImage(string fileName)
9 | {
10 | _fileName = fileName;
11 | }
12 |
13 |
14 | public void display()
15 | {
16 | if (_realImage == null)
17 | {
18 | _realImage = new RealImage(_fileName);
19 | }
20 | _realImage.display();
21 | }
22 | }
23 | }
--------------------------------------------------------------------------------
/ProxyPattern/ProxyPattern.csproj:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 | Exe
5 | net6.0
6 | enable
7 | enable
8 |
9 |
10 |
11 |
--------------------------------------------------------------------------------
/ProxyPattern/RealImage.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace ProxyPattern
4 | {
5 |
6 | public class RealImage : Image
7 | {
8 |
9 | private string _fileName;
10 |
11 | public RealImage(string fileName)
12 | {
13 | _fileName = fileName;
14 | loadFromDisk(_fileName);
15 | }
16 |
17 | public void display()
18 | {
19 | Console.WriteLine("Displaying " + _fileName);
20 | }
21 |
22 | private void loadFromDisk(string fileName)
23 | {
24 | Console.WriteLine("Loading " + fileName);
25 | }
26 | }
27 | }
--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
1 | # Design Patterns
2 | Design patterns are solutions to recurring problems; guidelines on how to tackle certain problems.
3 | I have included implementations of some design patterns in C# to help beginners like me get their feet wet.
4 | There are better alternatives available for some of them in the .NET Framework, so this is by no means a comprehensive tutorial.
5 |
6 | Any comments and suggestions are welcome. If you want to add a new design pattern implementation, just follow the naming convention, fork my repo and submit a pull request. Same goes for any improvements and modifications.
7 |
8 | This was created as a C# alternative to Java while reading https://www.oreilly.com/library/view/head-first-design/0596007124/ <- take a look at it if anything confuses you.
9 |
10 | ## Types of Design Patterns
11 | ---------------------------
12 | There are three kinds of Design Patterns:
13 |
14 | * Creational
15 | * Structural
16 | * Behavioral
17 |
18 | ## List of Design Pattern Implementations
19 | -----------------------------------------
20 |
21 | * [Adapter](/AdapterPattern)
22 | * [Bridge](/BridgePattern)
23 | * [Builder](/BuilderPattern)
24 | * [ChainOfResponsibility](/ChainOfResponsibilityPattern)
25 | * [Command](/CommandPattern)
26 | * [Composite](/CompositePattern)
27 | * [Decorator](/DecoratorPattern)
28 | * [Facade](/FacadePattern)
29 | * [Factory](/FactoryPattern)
30 | * [Flyweight](/FlyweightPattern)
31 | * [Iterator](/IteratorPattern)
32 | * [Mediator](/MediatorPattern)
33 | * [Observer](/ObserverPattern)
34 | * [Prototype](/PrototypePattern)
35 | * [Proxy](/ProxyPattern)
36 | * [Singleton](/SingletonPattern)
37 | * [SingletonPattern.Tests](/SingletonPattern.Tests)
38 | * [State](/StatePattern)
39 | * [Strategy](/StrategyPattern)
40 | * [Template](/TemplatePattern)
41 | * [Visitor](/VisitorPattern)
42 |
--------------------------------------------------------------------------------
/SingletonPattern.Tests/SingletonPattern.Tests.csproj:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 | net6.0
5 | enable
6 | enable
7 |
8 | false
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
21 |
22 |
23 |
24 |
--------------------------------------------------------------------------------
/SingletonPattern.Tests/SingletonPatternTests.cs:
--------------------------------------------------------------------------------
1 | namespace SingletonPattern.Tests
2 | {
3 | [TestFixture]
4 | public class SingletonPatternTests
5 | {
6 | [Test]
7 | public void GetInstance_CreateInstanceTwice_AreEqual()
8 | {
9 | // Arrange, Act
10 | var firstAttemptInstance = ChocolateBoiler.GetInstance();
11 | var secondAttemptInstance = ChocolateBoiler.GetInstance();
12 |
13 | // Assert
14 | Assert.That(firstAttemptInstance, Is.EqualTo(secondAttemptInstance));
15 | }
16 | }
17 | }
18 |
--------------------------------------------------------------------------------
/SingletonPattern.Tests/Usings.cs:
--------------------------------------------------------------------------------
1 | global using NUnit.Framework;
2 |
--------------------------------------------------------------------------------
/SingletonPattern/ChocolateBoiler.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace SingletonPattern
4 | {
5 | internal partial class ChocolateBoiler
6 | {
7 | private static readonly Lazy _singleton = new Lazy(() => new ChocolateBoiler());
8 |
9 | public static ChocolateBoiler GetInstance() => _singleton.Value;
10 |
11 | private Status _boiler;
12 |
13 | private ChocolateBoiler()
14 | {
15 | Console.WriteLine("Starting");
16 | _boiler = Status.Empty;
17 | }
18 |
19 | public void Fill()
20 | {
21 | if (!IsEmpty) return;
22 | Console.WriteLine("Filling...");
23 | _boiler = Status.InProgress;
24 | }
25 |
26 | public void Drain()
27 | {
28 | if (!IsBoiled) return;
29 | Console.WriteLine("Draining...");
30 | _boiler = Status.Empty;
31 | }
32 |
33 | public void Boil()
34 | {
35 | if (IsBoiled || IsEmpty) return;
36 | Console.WriteLine("Boiling...");
37 | _boiler = Status.Boiled;
38 | }
39 |
40 | private bool IsEmpty => (_boiler == Status.Empty);
41 |
42 | private bool IsBoiled => (_boiler == Status.Boiled);
43 | }
44 | }
45 |
--------------------------------------------------------------------------------
/SingletonPattern/Program.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace SingletonPattern
4 | {
5 | static class Program
6 | {
7 | static void Main()
8 | {
9 | try
10 | {
11 | var chocoEggs = ChocolateBoiler.GetInstance();
12 | chocoEggs.Fill();
13 | chocoEggs.Boil();
14 | chocoEggs.Drain();
15 | }
16 | catch (Exception)
17 | {
18 | Console.Write("Oops");
19 | }
20 | }
21 | }
22 | }
23 |
--------------------------------------------------------------------------------
/SingletonPattern/Properties/AssemblyInfo.cs:
--------------------------------------------------------------------------------
1 | using System.Runtime.CompilerServices;
2 |
3 | [assembly:InternalsVisibleTo("SingletonPattern.Tests")]
4 |
--------------------------------------------------------------------------------
/SingletonPattern/SingletonPattern.csproj:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 | Exe
5 | net6.0
6 | enable
7 | enable
8 |
9 |
10 |
11 |
--------------------------------------------------------------------------------
/SingletonPattern/Status.cs:
--------------------------------------------------------------------------------
1 | namespace SingletonPattern
2 | {
3 | internal partial class ChocolateBoiler
4 | {
5 | private enum Status
6 | {
7 | Empty, InProgress, Boiled
8 | }
9 | }
10 | }
11 |
--------------------------------------------------------------------------------
/StatePattern/GumballMachine.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace StatePattern
4 | {
5 | public class GumballMachine
6 | {
7 | public int Count { get; private set; }
8 |
9 | public IState SoldOutState;
10 | public IState NoQuarterState;
11 | public IState HasQuarterState;
12 | public IState SoldState;
13 | public IState WinnerState;
14 |
15 | public IState State { get; set; }
16 |
17 | public GumballMachine(int count)
18 | {
19 | Count = count;
20 | SoldOutState = new SoldOutState(this);
21 | NoQuarterState = new NoQuarterState(this);
22 | HasQuarterState = new HasQuarterState(this);
23 | SoldState = new SoldState(this);
24 | WinnerState = new WinnerState(this);
25 | if (Count > 0)
26 | {
27 | State = NoQuarterState;
28 | }
29 | }
30 |
31 | public void InsertQuarter()
32 | {
33 | State.InsertQuarter();
34 | }
35 |
36 | public void EjectQuarter()
37 | {
38 | State.EjectQuarter();
39 | }
40 |
41 | public void TurnCrank()
42 | {
43 | State.TurnCrank();
44 | State.Dispense();
45 | }
46 |
47 | public void ReleaseBall()
48 | {
49 | Console.WriteLine("A ball comes rolling down");
50 | if (Count == 0) return;
51 | Count--;
52 | }
53 | }
54 | }
--------------------------------------------------------------------------------
/StatePattern/HasQuarterState.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace StatePattern
4 | {
5 | public class HasQuarterState : IState
6 | {
7 | private GumballMachine Machine { get; }
8 | readonly Random _random = new Random(DateTime.Now.Millisecond);
9 |
10 | public HasQuarterState(GumballMachine gumballMachine)
11 | {
12 | Machine = gumballMachine;
13 | }
14 |
15 | public void InsertQuarter()
16 | {
17 | Console.WriteLine("Can't insert more than one");
18 | }
19 |
20 | public void EjectQuarter()
21 | {
22 | Console.WriteLine("Quarter returned");
23 | Machine.State = Machine.NoQuarterState;
24 | }
25 |
26 | public void TurnCrank()
27 | {
28 | Console.WriteLine("You turned the crank");
29 | var winner = _random.Next(10);
30 | if ((winner == 5) && (Machine.Count > 1))
31 | Machine.State = Machine.WinnerState;
32 | else
33 | {
34 | Machine.State = Machine.SoldState;
35 | }
36 | }
37 |
38 | public void Dispense()
39 | {
40 | Console.WriteLine("Can't do that");
41 | }
42 | }
43 | }
--------------------------------------------------------------------------------
/StatePattern/IState.cs:
--------------------------------------------------------------------------------
1 | namespace StatePattern
2 | {
3 | public interface IState
4 | {
5 | void InsertQuarter();
6 | void EjectQuarter();
7 | void TurnCrank();
8 | void Dispense();
9 | }
10 | }
--------------------------------------------------------------------------------
/StatePattern/Legacy/GumballMachine.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace StatePattern.Legacy
4 | {
5 | public class GumballMachine
6 | {
7 | private int _count;
8 | private State _state = State.NoQuarters;
9 |
10 | public GumballMachine(int count)
11 | {
12 | _count = count;
13 | }
14 |
15 | public void InsertQuarter()
16 | {
17 | switch (_state)
18 | {
19 | case State.NoQuarters:
20 | _state = State.HasQuarters;
21 | Console.WriteLine("Inserted a quarter");
22 | break;
23 | case State.Sold:
24 | Console.WriteLine("Please wait for current gumball to come out");
25 | break;
26 | case State.HasQuarters:
27 | Console.WriteLine("Can't add more quarters");
28 | break;
29 | case State.NoGumballs:
30 | Console.WriteLine("Out of Stock");
31 | break;
32 | default:
33 | throw new ArgumentOutOfRangeException();
34 | }
35 | }
36 |
37 | public void EjectQuarter()
38 | {
39 | switch (_state)
40 | {
41 | case State.NoQuarters:
42 | Console.WriteLine("Nothing to eject");
43 | break;
44 | case State.Sold:
45 | Console.WriteLine("Sorry, you have already turned the crank");
46 | break;
47 | case State.HasQuarters:
48 | Console.WriteLine("Ejecting..");
49 | _state = State.NoQuarters;
50 | break;
51 | case State.NoGumballs:
52 | Console.WriteLine("Can't eject, never accepted quarters");
53 | break;
54 | default:
55 | throw new ArgumentOutOfRangeException();
56 | }
57 | }
58 |
59 | public void TurnCrank()
60 | {
61 | switch (_state)
62 | {
63 | case State.NoQuarters:
64 | Console.WriteLine("Insert quarter First");
65 | break;
66 | case State.Sold:
67 | Console.WriteLine("Turning twice won't get you a gumball");
68 | break;
69 | case State.HasQuarters:
70 | Console.WriteLine("Getting gumball...");
71 | _state = State.Sold;
72 | Dispense();
73 | break;
74 | case State.NoGumballs:
75 | Console.WriteLine("Out of Stock");
76 | break;
77 | default:
78 | throw new ArgumentOutOfRangeException();
79 | }
80 | }
81 |
82 | private void Dispense()
83 | {
84 | switch (_state)
85 | {
86 | case State.NoQuarters:
87 | Console.WriteLine("You need to pay first");
88 | break;
89 | case State.Sold:
90 | Console.WriteLine("A Gumball comes rolling out");
91 | _count--;
92 | _state = _count == 0 ? _state = State.NoGumballs : State.NoQuarters;
93 | break;
94 | case State.HasQuarters:
95 | case State.NoGumballs:
96 | Console.WriteLine("Can't dispense");
97 | break;
98 | default:
99 | throw new ArgumentOutOfRangeException();
100 | }
101 | }
102 | }
103 | }
--------------------------------------------------------------------------------
/StatePattern/Legacy/State.cs:
--------------------------------------------------------------------------------
1 | namespace StatePattern.Legacy
2 | {
3 | public enum State
4 | {
5 | Sold, HasQuarters, NoQuarters, NoGumballs
6 | }
7 | }
--------------------------------------------------------------------------------
/StatePattern/NoQuarterState.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace StatePattern
4 | {
5 | public class NoQuarterState : IState
6 | {
7 | public GumballMachine Machine { get; }
8 |
9 | public NoQuarterState(GumballMachine machine)
10 | {
11 | Machine = machine;
12 | }
13 | public void InsertQuarter()
14 | {
15 | Console.WriteLine("Inserted a quarter");
16 | Machine.State = Machine.HasQuarterState;
17 | }
18 |
19 | public void EjectQuarter()
20 | {
21 | Console.Write("Can't eject anything");
22 | }
23 |
24 | public void TurnCrank()
25 | {
26 | Console.WriteLine("Can't turn crank without a quarter");
27 | }
28 |
29 | public void Dispense()
30 | {
31 | Console.WriteLine("Can't dispense");
32 | }
33 | }
34 | }
--------------------------------------------------------------------------------
/StatePattern/Program.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace StatePattern
4 | {
5 | static class Program
6 | {
7 | public static void Main()
8 | {
9 | LegacyTest();
10 | Console.WriteLine();
11 | var gumballmachine = new GumballMachine(5);
12 | gumballmachine.InsertQuarter();
13 | gumballmachine.TurnCrank();
14 | gumballmachine.InsertQuarter();
15 | gumballmachine.TurnCrank();
16 | }
17 |
18 | private static void LegacyTest()
19 | {
20 | var machine = new Legacy.GumballMachine(2);
21 | machine.InsertQuarter();
22 | machine.TurnCrank();
23 | machine.InsertQuarter();
24 | machine.EjectQuarter();
25 | machine.InsertQuarter();
26 | }
27 | }
28 | }
29 |
--------------------------------------------------------------------------------
/StatePattern/SoldOutState.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace StatePattern
4 | {
5 | public class SoldOutState : IState
6 | {
7 | public GumballMachine Machine { get; }
8 |
9 | public SoldOutState(GumballMachine gumballMachine)
10 | {
11 | Machine = gumballMachine;
12 | }
13 |
14 | public void InsertQuarter()
15 | {
16 | Console.WriteLine("Sorry! Sold Out");
17 | }
18 |
19 | public void EjectQuarter()
20 | {
21 | Console.WriteLine("Can't eject when sold out");
22 | }
23 |
24 | public void TurnCrank()
25 | {
26 | Console.WriteLine("turning crank achieves nothing");
27 | }
28 |
29 | public void Dispense()
30 | {
31 | Console.WriteLine("Can't dispense when out of stock");
32 | }
33 | }
34 | }
--------------------------------------------------------------------------------
/StatePattern/SoldState.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace StatePattern
4 | {
5 | public class SoldState : IState
6 | {
7 | private GumballMachine Machine { get; }
8 |
9 | public SoldState(GumballMachine gumballMachine)
10 | {
11 | Machine = gumballMachine;
12 | }
13 |
14 | public void InsertQuarter()
15 | {
16 | Console.WriteLine("Please wait, already in progress");
17 | }
18 |
19 | public void EjectQuarter()
20 | {
21 | Console.WriteLine("Can't eject, already turned the crank");
22 | }
23 |
24 | public void TurnCrank()
25 | {
26 | Console.WriteLine("Turning twice achieves nothing");
27 | }
28 |
29 | public void Dispense()
30 | {
31 | Machine.ReleaseBall();
32 | if (Machine.Count > 0)
33 | {
34 | Machine.State = Machine.NoQuarterState;
35 | }
36 | else
37 | {
38 | Console.WriteLine("Oops! No more gumballs");
39 | Machine.State = Machine.SoldOutState;
40 | }
41 | }
42 | }
43 | }
--------------------------------------------------------------------------------
/StatePattern/StatePattern.csproj:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 | Exe
5 | net6.0
6 | enable
7 | enable
8 |
9 |
10 |
11 |
--------------------------------------------------------------------------------
/StatePattern/WinnerState.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace StatePattern
4 | {
5 | public class WinnerState : IState
6 | {
7 | private GumballMachine Machine { get; }
8 |
9 | public WinnerState(GumballMachine gumballMachine)
10 | {
11 | Machine = gumballMachine;
12 | }
13 |
14 | public void InsertQuarter()
15 | {
16 | Console.WriteLine("Please wait, already in progress");
17 | }
18 |
19 | public void EjectQuarter()
20 | {
21 | Console.WriteLine("Can't eject, already turned the crank");
22 | }
23 |
24 | public void TurnCrank()
25 | {
26 | Console.WriteLine("Turning twice achieves nothing");
27 | }
28 |
29 |
30 | public void Dispense()
31 | {
32 | Console.WriteLine("You Won!! 2 gumballs for the price of one");
33 | Machine.ReleaseBall();
34 | if (Machine.Count == 0)
35 | {
36 | Machine.State = Machine.SoldOutState;
37 | Console.WriteLine("Oops! No more gumballs");
38 | }
39 | else
40 | {
41 | Machine.ReleaseBall();
42 | Machine.State = Machine.NoQuarterState;
43 | }
44 | }
45 | }
46 | }
--------------------------------------------------------------------------------
/StrategyPattern/FlyNope.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace Ducks
4 | {
5 | class FlyNope : IFlyBehaviour
6 | {
7 | public void Fly()
8 | {
9 | Console.WriteLine("I can't fly");
10 | }
11 | }
12 | }
13 |
--------------------------------------------------------------------------------
/StrategyPattern/FlyWings.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace Ducks
4 | {
5 | class FlyWings : IFlyBehaviour
6 | {
7 | public void Fly()
8 | {
9 | Console.WriteLine("Flap Flap");
10 | }
11 | }
12 | }
13 |
--------------------------------------------------------------------------------
/StrategyPattern/IFlyBehaviour.cs:
--------------------------------------------------------------------------------
1 | namespace Ducks
2 | {
3 | internal interface IFlyBehaviour
4 | {
5 | void Fly();
6 | }
7 | }
8 |
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/StrategyPattern/IQuackBehaviour.cs:
--------------------------------------------------------------------------------
1 | namespace Ducks
2 | {
3 | internal interface IQuackBehaviour
4 | {
5 | void Quack();
6 | }
7 | }
--------------------------------------------------------------------------------
/StrategyPattern/Program.cs:
--------------------------------------------------------------------------------
1 | namespace Ducks
2 | {
3 | internal class Duck
4 | {
5 | private IQuackBehaviour _quacker;
6 | private IFlyBehaviour _flyer;
7 |
8 |
9 | public IQuackBehaviour Quacker
10 | {
11 | set
12 | {
13 | _quacker = value;
14 | }
15 | }
16 |
17 | public IFlyBehaviour Flyer
18 | {
19 | set
20 | {
21 | _flyer = value;
22 | }
23 | }
24 |
25 |
26 | protected void PerformQuack()
27 | {
28 | _quacker.Quack();
29 | }
30 |
31 | protected void PerformFly()
32 | {
33 | _flyer.Fly();
34 | }
35 | }
36 |
37 | internal class MallardDuck : Duck
38 | {
39 | public MallardDuck()
40 | {
41 | Flyer = new FlyNope();
42 | Quacker = new QuackNope();
43 | }
44 |
45 | public void Display()
46 | {
47 | PerformFly();
48 | PerformQuack();
49 | }
50 | }
51 |
52 | internal static class Program
53 | {
54 | private static void Main()
55 | {
56 | var mallard = new MallardDuck { Quacker = new QuackNormal() };
57 | mallard.Display();
58 | mallard.Flyer = new FlyWings();
59 | mallard.Display();
60 |
61 | }
62 | }
63 | }
64 |
--------------------------------------------------------------------------------
/StrategyPattern/QuackNope.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace Ducks
4 | {
5 | internal class QuackNope : IQuackBehaviour
6 | {
7 | public void Quack()
8 | {
9 | Console.WriteLine("...");
10 | }
11 | }
12 | }
--------------------------------------------------------------------------------
/StrategyPattern/QuackNormal.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace Ducks
4 | {
5 | class QuackNormal : IQuackBehaviour
6 | {
7 | public void Quack()
8 | {
9 | Console.WriteLine("Quack Quack");
10 | }
11 | }
12 | }
13 |
--------------------------------------------------------------------------------
/StrategyPattern/QuackSqueak.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace Ducks
4 | {
5 | class QuackSqueak : IQuackBehaviour
6 | {
7 | public void Quack()
8 | {
9 | Console.WriteLine("Squeeeak");
10 | }
11 | }
12 | }
13 |
--------------------------------------------------------------------------------
/StrategyPattern/StrategyPattern.csproj:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 | Exe
5 | net6.0
6 | enable
7 | enable
8 |
9 |
10 |
11 |
--------------------------------------------------------------------------------
/TemplatePattern/Beverages/Beverage.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace TemplatePattern
4 | {
5 | public abstract class Beverage
6 | {
7 | // ReSharper disable once InconsistentNaming
8 | protected int _sugar;
9 | public void Prepare()
10 | {
11 | Boil();
12 | Brew();
13 | Pour();
14 | if (WantsCondiments)
15 | AddCondiments();
16 |
17 | }
18 |
19 | public bool WantsCondiments { private get; set; }
20 |
21 |
22 | protected abstract void Brew();
23 |
24 | private void Boil()
25 | {
26 | Console.WriteLine("Boling Water");
27 | }
28 |
29 | private void Pour()
30 | {
31 | Console.WriteLine("Pouring in Cup");
32 | }
33 |
34 | protected abstract void AddCondiments();
35 |
36 | public int AddSugar { get; set; }
37 |
38 | protected void Sugar() { }
39 | }
40 | }
--------------------------------------------------------------------------------
/TemplatePattern/Beverages/Coffee.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace TemplatePattern
4 | {
5 | class Coffee : Beverage
6 | {
7 | protected override void Brew()
8 | {
9 | Console.WriteLine("Add Coffee Grounds to water and boil");
10 | }
11 |
12 | protected override void AddCondiments()
13 | {
14 | Console.WriteLine("Add Milk and Sugar");
15 | }
16 |
17 | }
18 | }
19 |
--------------------------------------------------------------------------------
/TemplatePattern/Beverages/Tea.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace TemplatePattern
4 | {
5 | class Tea : Beverage
6 | {
7 | protected override void Brew()
8 | {
9 | Console.WriteLine("Adding tea leaves to water and boil");
10 | }
11 |
12 | protected override void AddCondiments()
13 | {
14 | Console.WriteLine("Adding Lemon and Sugar");
15 | Sugar();
16 | }
17 |
18 | private new void Sugar()
19 | {
20 | Console.WriteLine($"adding {_sugar} spoons of sugar");
21 | }
22 |
23 | public new int AddSugar
24 | {
25 | set { _sugar = value; }
26 | }
27 | }
28 | }
--------------------------------------------------------------------------------
/TemplatePattern/Comparable/Person.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace TemplatePattern.Comparable
4 | {
5 | class Person : IComparable
6 | {
7 | public string Name { get; }
8 | public int Age { get; }
9 |
10 | public Person(string name, int age)
11 | {
12 | Name = name;
13 | Age = age;
14 | }
15 |
16 | public int CompareTo(object obj)
17 | {
18 | var other = (Person)obj;
19 | if (String.Compare(Name, other.Name, StringComparison.Ordinal) == 0)
20 | {
21 | return Age.CompareTo(other.Age);
22 | }
23 | return String.Compare(Name, other.Name, StringComparison.Ordinal);
24 | }
25 |
26 | public override string ToString()
27 | {
28 | return $"{Name} : {Age} < ";
29 | }
30 |
31 | }
32 | }
--------------------------------------------------------------------------------
/TemplatePattern/Program.cs:
--------------------------------------------------------------------------------
1 | using System;
2 | using System.Collections.Generic;
3 | using TemplatePattern.Comparable;
4 |
5 | namespace TemplatePattern
6 | {
7 | internal static class Program
8 | {
9 | static void Main()
10 | {
11 | var tea = new Tea();
12 | var coffee = new Coffee();
13 | tea.WantsCondiments = true;
14 | tea.AddSugar = 5;
15 | tea.Prepare();
16 |
17 | Console.WriteLine();
18 | coffee.WantsCondiments = true;
19 | coffee.Prepare();
20 |
21 | var people = new List { new Person("Ram", 25), new Person("Abishek", 12), new Person("Ram", 18), new Person("Abishek", 18) };
22 | foreach (var person in people)
23 | {
24 | Console.Write(person);
25 | }
26 | people.Sort();
27 | Console.WriteLine();
28 | foreach (var person in people)
29 | {
30 | Console.Write(person);
31 | }
32 | }
33 | }
34 | }
35 |
--------------------------------------------------------------------------------
/TemplatePattern/TemplatePattern.csproj:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 | Exe
5 | net6.0
6 | enable
7 | enable
8 |
9 |
10 |
11 |
--------------------------------------------------------------------------------
/VisitorPattern/Apartment.cs:
--------------------------------------------------------------------------------
1 | namespace VisitorPattern
2 | {
3 | public class Apartment : Unit
4 | {
5 | public Apartment(params Unit[] units) : base(units)
6 | {
7 | }
8 |
9 | public override void Accept(IUnitVisitor visitor)
10 | {
11 | visitor.VisitApartment(this);
12 | base.Accept(visitor);
13 | }
14 |
15 | public override string ToString()
16 | {
17 | return "Apartment";
18 | }
19 | }
20 | }
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/VisitorPattern/ApartmentVisitor.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace VisitorPattern
4 | {
5 | public class ApartmentVisitor : IUnitVisitor
6 | {
7 | public void VisitApartment(Apartment apartment)
8 | {
9 | Console.WriteLine("This is an apartment");
10 | }
11 |
12 | public void VisitStudio(Studio studio)
13 | {
14 | }
15 |
16 | public void VisitBedroom(Bedroom bedroom)
17 | {
18 | }
19 |
20 | public void VisitLivingRoom(LivingRoom livingRoom)
21 | {
22 | }
23 | }
24 | }
--------------------------------------------------------------------------------
/VisitorPattern/Bedroom.cs:
--------------------------------------------------------------------------------
1 | namespace VisitorPattern
2 | {
3 | public class Bedroom : Unit
4 | {
5 | public Bedroom(params Unit[] units) : base(units)
6 | {
7 | }
8 |
9 | public override void Accept(IUnitVisitor visitor)
10 | {
11 | visitor.VisitBedroom(this);
12 | base.Accept(visitor);
13 | }
14 |
15 | public override string ToString()
16 | {
17 | return "Bedroom";
18 | }
19 | }
20 | }
--------------------------------------------------------------------------------
/VisitorPattern/BedroomVisitor.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace VisitorPattern
4 | {
5 | public class BedroomVisitor : IUnitVisitor
6 | {
7 | public void VisitApartment(Apartment apartment)
8 | {
9 | }
10 |
11 | public void VisitStudio(Studio studio)
12 | {
13 | }
14 |
15 | public void VisitBedroom(Bedroom bedroom)
16 | {
17 | Console.WriteLine("Here is a bedroom");
18 | }
19 |
20 | public void VisitLivingRoom(LivingRoom livingRoom)
21 | {
22 | }
23 | }
24 | }
--------------------------------------------------------------------------------
/VisitorPattern/IUnitVisitor.cs:
--------------------------------------------------------------------------------
1 | namespace VisitorPattern
2 | {
3 | public interface IUnitVisitor
4 | {
5 | void VisitApartment(Apartment apartment);
6 | void VisitStudio(Studio studio);
7 | void VisitBedroom(Bedroom bedroom);
8 | void VisitLivingRoom(LivingRoom livingRoom);
9 | }
10 | }
--------------------------------------------------------------------------------
/VisitorPattern/LivingRoom.cs:
--------------------------------------------------------------------------------
1 | namespace VisitorPattern
2 | {
3 | public class LivingRoom : Unit
4 | {
5 | public LivingRoom(params Unit[] units) : base(units)
6 | {
7 | }
8 |
9 | public override void Accept(IUnitVisitor visitor)
10 | {
11 | visitor.VisitLivingRoom(this);
12 | base.Accept(visitor);
13 | }
14 |
15 | public override string ToString()
16 | {
17 | return "Living Room";
18 | }
19 | }
20 | }
--------------------------------------------------------------------------------
/VisitorPattern/LivingRoomVisitor.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace VisitorPattern
4 | {
5 | public class LivingRoomVisitor : IUnitVisitor
6 | {
7 | public void VisitApartment(Apartment apartment)
8 | {
9 | }
10 |
11 | public void VisitStudio(Studio studio)
12 | {
13 | }
14 |
15 | public void VisitBedroom(Bedroom bedroom)
16 | {
17 | }
18 |
19 | public void VisitLivingRoom(LivingRoom livingRoom)
20 | {
21 | Console.WriteLine("This is the living room");
22 | }
23 | }
24 | }
--------------------------------------------------------------------------------
/VisitorPattern/Program.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace VisitorPattern
4 | {
5 | class Program
6 | {
7 | static void Main()
8 | {
9 | var apartment = new Apartment(new LivingRoom(), new Bedroom(), new Bedroom());
10 | var studio = new Studio(new LivingRoom(), new Bedroom());
11 | Console.WriteLine("Visiting an Apartment");
12 | apartment.Accept(new ApartmentVisitor());
13 | apartment.Accept(new LivingRoomVisitor());
14 | apartment.Accept(new BedroomVisitor());
15 |
16 | Console.WriteLine("Visiting a Studio");
17 | studio.Accept(new StudioVisitor());
18 | studio.Accept(new LivingRoomVisitor());
19 | studio.Accept(new BedroomVisitor());
20 | }
21 | }
22 | }
--------------------------------------------------------------------------------
/VisitorPattern/Studio.cs:
--------------------------------------------------------------------------------
1 | namespace VisitorPattern
2 | {
3 | public class Studio : Unit
4 | {
5 | public Studio(params Unit[] units) : base(units)
6 | {
7 | }
8 |
9 | public override void Accept(IUnitVisitor visitor)
10 | {
11 | visitor.VisitStudio(this);
12 | base.Accept(visitor);
13 | }
14 |
15 | public override string ToString()
16 | {
17 | return "Studio";
18 | }
19 | }
20 | }
--------------------------------------------------------------------------------
/VisitorPattern/StudioVisitor.cs:
--------------------------------------------------------------------------------
1 | using System;
2 |
3 | namespace VisitorPattern
4 | {
5 | public class StudioVisitor : IUnitVisitor
6 | {
7 | public void VisitApartment(Apartment apartment)
8 | {
9 | }
10 |
11 | public void VisitStudio(Studio studio)
12 | {
13 | Console.WriteLine("This is a studio");
14 | }
15 |
16 | public void VisitBedroom(Bedroom bedroom)
17 | {
18 | }
19 |
20 | public void VisitLivingRoom(LivingRoom livingRoom)
21 | {
22 | }
23 | }
24 | }
--------------------------------------------------------------------------------
/VisitorPattern/Unit.cs:
--------------------------------------------------------------------------------
1 | namespace VisitorPattern
2 | {
3 | public abstract class Unit
4 | {
5 | private Unit[] _units;
6 |
7 | public Unit(params Unit[] units)
8 | {
9 | _units = units;
10 | }
11 |
12 | public virtual void Accept(IUnitVisitor visitor)
13 | {
14 | foreach (var unit in _units)
15 | {
16 | unit.Accept(visitor);
17 | }
18 | }
19 |
20 | public abstract string ToString();
21 | }
22 | }
--------------------------------------------------------------------------------
/VisitorPattern/VisitorPattern.csproj:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 | Exe
5 | net6.0
6 | enable
7 | enable
8 |
9 |
10 |
11 |
--------------------------------------------------------------------------------