What CLR is needed for C# 6?

Question

The title says it all: what CLR version is / will be needed to run C# 6 programs? The CLR version is interesting to find out the system requirements and supported operating

Answer 1

It is version 4 of CLR that is used. If you test Environment.Version in Visual Studio "14" CTPs you will get:

4.0.30319.35317

With code:

Console.WriteLine(Environment.Version);

Also if you look at Common Language Runtime (CLR) on MSDN you will find:

.Net Framework Version                     CLR Version
4.5 (including 4.5.1 and 4.5.2)            4

Answer 2

In order to have C# 6 you need:

• VS 2013
• Download C# 6 from Codeplex -Roslyn

VS 2013 runs on .NET 4.5.1 so I guess the answer to your Question is 4.5.1

Answer 3

C # 6 language enhancements is compatible to .net framework starting from 2.0 to 4.6. It does not require any higher version of .net framework but need higher version of Visual studio such as VS 2015. C# 6 is also available to VS 2013 with addon https://github.com/dotnet/roslyn