E>namespace Roslyn.Compilers.CSharp
E>{
E>  public enum LanguageVersion
E>  {
E>    CSharp1 = 1,
E>    CSharp2 = 2,
E>    CSharp3 = 3,
E>    CSharp4 = 4,
E>    CSharp5 = 5,
E>    CSharp6 = 6,
E>  }
E>}
E>