Differentiate on C# (programming language)

Summary of versions

C# 2.0	C# 3.0	C# 4.0	C# 5.0[32]	C# 6.0
Generics[33] Partial types[33] Anonymous methods[33] Iterators[33] Nullable types[33] Getter/setter separate accessibility[33] Method group conversions (delegates)[33] Co- and Contra-variance for delegates[33] Static classes[33]	Implicitly typed local variables[34] Object and collection initializers[34] Auto-Implemented properties[34] Anonymous types[34] Extension methods[34] Query expressions[34] Lambda expressions[34] Expression trees[34] Partial methods[35]	Dynamic binding[36] Named and optional arguments[36] Generic co- and contravariance[36] Embedded interop types ("NoPIA")[36]	Asynchronous methods[37] Caller info attributes[37]	C# 6.0 Compiler-as-a-service (Roslyn) Import of static type members into namespace[38] Exception filters[38] Await in catch/finally blocks[38] Auto property initializers[38] Default values for getter-only properties[38] Expression-bodied members[38] Null propagator (Succinct null checking)[38] String Interpolation[38] nameof operator[38] Dictionary initializer[38] C# 7.0 Proposals Declaration expressions[39] Parameter arrays for IEnumerable interfaces[39]

Versions[edit]

Version	Language specification			Date	.NET Framework	Visual Studio
	ECMA	ISO/IEC	Microsoft
C# 1.0	December 2002	April 2003	January 2002	January 2002	.NET Framework 1.0	Visual Studio .NET 2002
C# 1.2			October 2003	April 2003	.NET Framework 1.1	Visual Studio .NET 2003
C# 2.0	June 2006	September 2006	September 2005[note 3]	November 2005	.NET Framework 2.0	Visual Studio 2005
C# 3.0	None[note 4]		August 2007	November 2007	.NET Framework 2.0 (Except LINQ/Query Extensions)[30] .NET Framework 3.0 (Except LINQ/Query Extensions)[30] .NET Framework 3.5	Visual Studio 2008 Visual Studio 2010
C# 4.0			April 2010	April 2010	.NET Framework 4	Visual Studio 2010
C# 5.0	In Progress[31]	None[note 5]	June 2013	August 2012	.NET Framework 4.5	Visual Studio 2012 Visual Studio 2013
C# 6.0	None[note 6]		July 2015	July 2015	.NET Framework 4.6	Visual Studio 2015