Minor changes and bugfixes C# with Example

Parentheses are now forbidden around named parameters. The following compiles in C#5, but not C#6 
Version ≤ 5.0 
Console.WriteLine((value: 23)); 
Operands of is and as are no longer allowed to be method groups. The following compiles in C#5, but not C#6 
Version ≤ 5.0 
var result = "".Any is byte; 
The native compiler allowed this (although it did show a warning), and in fact didn ’t even check extension 
method compatibility, allowing crazy things like 1.Any is string or IDisposable.Dispose is object. 
See this reference for updates on changes.