c#-6.0

This question already has an answer here: How to enable C# 6.0 feature in Visual Studio 2013? 6 answers Is there any way to add C# 6.0 to Visual Studio 2013? If I can't why is that? The best you can currently do for VS2013 is download the April End User Preview , which is pretty outdated by now. The VS2013 compiler (as is) doesn't "understand" C#-6 features. Most, if not all of the C# new features are syntactic sugar which the compiler interprets and emits different code for. In order for VS2013 to support that, it has to upgrade the compiler to support those features. Not to mention VS2015

This question already has an answer here: Does C# 6.0 work for .NET 4.0? 5 answers Is it possible to use Roslyn compiler and new features of C# 6.0 with old versions of .NET Runtime (for example, .NET 4.0)? For example, I want use the expression-bodied members ( int S => x + y; instead of int S { get { return x + y; } } ) in .NET 4.0 application. The new C# 6.0 features don't depend upon framework support so yes, you an app compiled with the C# 6.0 compiler will run on .NET 4.0, assuming of course you specify you are targeting .NET 4.0 in your project file in the first place. As of now Roslyn

I was experimenting with nameof with generics. I didn't get the result I was expecting. I'm not sure if this is part of the spec or not. class MainClass { public static void Main (string[] args) { Console.WriteLine ($"Hello { nameof(FooBar<string>)! }"); } } class FooBar<T> { } The output I get is Hello FooBar! I would expect some details about the type parameters. I tried it with a method and that fails with a compiler error: class MainClass { public static void Main (string[] args) { Console.WriteLine ($"Hello { nameof(Do<string>) }"); } public static T Do<T>() {} } Error CS8084: An argument

I want to use the nameof operator in my C# project in Visual Studio 2015 but the compiler complains with the following message. Feature 'nameof operator' is not available in C# 5. Please use language version 6 or greater. I want to know how I can change the C# language version from Visual Studio 2015. Try this.. Project -> Properties -> Build -> Advanced -> Language Version Go to Project → Properties → Build → Advanced → Language Version → OK as shown with detail steps and screen shots below: Follow these steps to change the language version of your project 1: Open your project with Visual

I'm writing a piece of code in c#6 and for some strange reason this works var value = objectThatMayBeNull?.property; but this doesn't: int value = nullableInt?.Value; By not works I mean I get a compile error saying Cannot resolve symbol 'Value' . Any idea why the null conditional operator ?. isn't working? Okay, I have done some thinking and testing. This is what happens: int value = nullableInt?.Value; Gives this error message when compiling: Type 'int' does not contain a definition for `Value' That means that ? 'converts' the int? into the actual int value. This is effectively the same as:

A new feature in C# 6.0 allows to declare variable inside TryParse method. I have some code: string s = "Hello"; if (int.TryParse(s, out var result)) { } But I receive compile errors: What I am doing wrong? P.S.: in project settings C# 6.0 and .NET framework 4.6 are set. A new feature in C# 6.0 allows to declare variable inside TryParse method. Declaration expressions was cut from C# 6.0 and wasn't shipped in the final release. You currently can't do that. There is a proposal for it on GitHub for C# 7 (also see this for future reference). Update (07/03/2017) With the official release of C#7,

This code throws an exception on the marked line: using System; using System.Linq.Expressions; namespace ConsoleApplication2 { class Program { static void Main(string[] args) { Action<int, int> a = (x, y) => Console.WriteLine(x + y); ParameterExpression p1 = Expression.Parameter(typeof(int), "p1"); ParameterExpression p2 = Expression.Parameter(typeof(int), "p2"); // Here is the exception ArgumentNullException. MethodCallExpression call = Expression.Call(a.Method, p1, p2); } } } Now, I've tested this code in VS2013 (works like a charm) and in VS2015 Community (throws the exception). I followed

I have a project that the framework is targeting .NET Framework 4.6.1 , as part of the continuous integration process on the tfs we created a Build Solution task to ensure that the code compiles correctly. Now the TFS server has the latest version of the .Net Famework 4.6.2 . On the register this is the value for the Release key of the framework On all other OS versions: 394806 => .NET Framework 4.6.2 But when the build runs it comes with this error: Error CS1056: Unexpected character '$' I don't want to replace the string interpolation with the string.Format to solve this issue, please