title: c# compiler issue only supports language versions up to C# 5
body: <p>I have created a console application in VS2012</p>
  
  <pre><code>namespace ConsoleApplication1
  {
      class Program
      {
          static void Main(string[] args)
          {
              Console.WriteLine("hello");
          }
      }
  }
  </code></pre>
  
  <p>When I try to compile with csc.exe it wont work </p>
  
  <pre><code>D:\temp\ConsoleApplication1&gt; c:\windows\microsoft.net\framework\v4.0.30319\csc.exe /out:d:\temp\test.exe .\Program.cs
  Microsoft (R) Visual C# Compiler version 4.6.1055.0
  for C# 5
  Copyright (C) Microsoft Corporation. All rights reserved.
  
  This compiler is provided as part of the Microsoft (R) .NET Framework, but only supports language versions up to C# 5, which is no longer the latest version. For compilers that support newer versions of the C# programming language, see http://go.microsoft.com/fwlink/?LinkID=533240
  
  D:\temp\ConsoleApplication1&gt;
  </code></pre>
  
  <p>Why is this happening? It will build in VS no problem</p>