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9 | -------------------------------------------------------------------------------- /CSharp-6.0-New-Features/05. NameofExpressions/App.config: -------------------------------------------------------------------------------- 1 | 2 |Learn about building Web apps with ASP.NET Core.
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13 | Request ID: @Model.RequestId
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19 | Swapping to the Development environment displays detailed information about the error that occurred. 20 |
21 |22 | The Development environment shouldn't be enabled for deployed applications. 23 | It can result in displaying sensitive information from exceptions to end users. 24 | For local debugging, enable the Development environment by setting the ASPNETCORE_ENVIRONMENT environment variable to Development 25 | and restarting the app. 26 |
27 | -------------------------------------------------------------------------------- /CSharp-6.0-New-Features/07. ExceptionFilters/ExceptionFilterWithLogging.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | 3 | public static class ExceptionFilterWithLogging 4 | { 5 | public static void Demo() 6 | { 7 | try 8 | { 9 | throw new NotImplementedException(); 10 | } 11 | catch (Exception ex) when (Log(ex)) 12 | { 13 | } 14 | } 15 | 16 | // This method can inspect an exception “flying by” without intercepting its course. 17 | // This is a true-returning helper function which executes the side effects (logging). 18 | private static bool Log(Exception exception) 19 | { 20 | // Side effect (logging) 21 | Console.WriteLine("======== Message ========"); 22 | Console.WriteLine(exception.Message); 23 | Console.WriteLine("======== Stack trace from Log() ========"); 24 | Console.WriteLine(exception.StackTrace); 25 | 26 | // Continue to the catch block 27 | return true; // false, if we don't want to catch 28 | } 29 | } 30 | -------------------------------------------------------------------------------- /CSharp-7.0-New-Features/03. LocalFunctions/Program.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | 3 | public static class Program 4 | { 5 | public static void Main() 6 | { 7 | Console.WriteLine(ConcatenateStrings("a", "b", "c", "d")); 8 | Console.WriteLine(UsingClosure("a", "b", "c", "d")); 9 | } 10 | 11 | private static string UsingClosure(string a, string b, string c, string d) 12 | { 13 | string Concatenate() 14 | { 15 | return a + b + c + d; 16 | } 17 | 18 | return Concatenate(); 19 | } 20 | 21 | public static string ConcatenateStrings(string a, string b, string c, string d) 22 | { 23 | void Validate(string paramName, object param) 24 | { 25 | if (param == null) 26 | { 27 | throw new ArgumentException($"{paramName} cannot be null", paramName); 28 | } 29 | } 30 | 31 | Validate(nameof(a), a); 32 | Validate(nameof(b), b); 33 | Validate(nameof(c), c); 34 | Validate(nameof(d), d); 35 | 36 | return $"{a}{b}{c}{d}"; 37 | } 38 | } 39 | -------------------------------------------------------------------------------- /CSharp-6.0-New-Features/09. IndexInitializers/Program.cs: -------------------------------------------------------------------------------- 1 | using System.Collections.Generic; 2 | 3 | public static class Program 4 | { 5 | public static void Main() 6 | { 7 | // C# 5.0 8 | var numbersOldWay = new Dictionary