The c# version and .Net Framework

These are the versions of C# known about at the time of this writing:

• C# 1.0 released with .NET 1.0 and VS2002 (January 2002)
• C# 1.2 (bizarrely enough); released with .NET 1.1 and VS2003 (April 2003). First version to call

  Dispose

  on

  IEnumerator

  s which implemented

  IDisposable

  . A few other small features.

• C# 2.0 released with .NET 2.0 and VS2005 (November

  2005). Major new features: generics, anonymous methods, nullable types,

  iterator blocks

• C# 3.0 released with .NET 3.5 and VS2008 (November

  2007). Major new features: lambda expressions, extension methods,

  expression trees, anonymous types, implicit typing (

  var

  ), query expressions
• C# 4.0 released with .NET 4 and VS2010 (April 2010). Major new features: late binding (

  dynamic

  ), delegate and interface generic variance, more COM support, named arguments and optional parameters
• C# 5.0 released with .NET 4.5 and VS2012 (August 2012). Major features: async programming, caller info attributes. Breaking change: loop variable closure.

• C# 6.0 released with .NET 4.6 and VS2015 (July 2015). Implemented by Roslyn.

  Features: initializers for automatically implemented properties, using

  directives to import static members, exception filters, binary literals

  and digit separators, indexed members and element initializers,

  await

  in

  catch

  and

  finally

  , extension

  Add

  methods in collection initializers.