C# language versions

C# language versions

There are five significant language versions:

C# 1
C# 2, introducing generics, nullable types, anonymous methods, iterator blocks and some other more minor features
C# 3, introducing implicit typing, object and collection initializers, anonymous types, automatic properties, lambda expressions, extension methods, query expressions and some other minor features
C# 4, introducing dynamic typing, optional parameters, named arguments, and generic variance
C# 5, introducing asynchronous functions, caller info attributes, and a tweak to foreach iteration variable capture