C# Version History

Version	.NET Framework	Visual Studio	Important Features
C# 1.0	.NET Framework 1.0/1.1	Visual Studio .NET 2002	First release of C#
C# 2.0	.NET Framework 2.0	Visual Studio 2005	Generics
			Partial types
			Anonymous methods
			Nullable types
			Iterators
			Covariance and contravariance
C# 3.0	.NET Framework 3.0\3.5	Visual Studio 2008	Auto-implemented properties
			Anonymous types
			Query expressions
			Lambda expression
			Expression trees
			Extension methods
C# 4.0	.NET Framework 4.0	Visual Studio 2010	Dynamic binding
			Named/optional arguments
			Generic covariant and contravariant
			Embedded interop types
C# 5.0	.NET Framework 4.5	Visual Studio 2012/2013	Asynchronous members
			Caller info attributes
C# 6.0	.NET Framework 4.6	Visual Studio 2013/2015	Static imports
			Exception filters
			Property initializers
			Expression bodied members
			Null propagator
			String interpolation
			nameof operator
			Dictionary initializer
C# 7.0	.NET Core	Visual Studio 2017	Static imports
			Exception filters
			Property initializers
			Expression bodied members
			Null propagator
			String interpolation
			nameof operator
			Dictionary initializer