- 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
DisposeonIEnumerators which implementedIDisposable. 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, tuple data type 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, element initializers,
awaitincatchandfinally, extensionAddmethods in collection initializers. - C# 7.0 released with .NET 4.7 and VS2017 (March 2017) Major new features: tuples, ref locals and ref return, pattern matching (including pattern-based switch statements), inline
outparameter declarations, local functions, binary literals, digit separators, and arbitrary async returns. - C# 7.1 released with VS2017 v15.3 (August 2017) Minor new features: async main, tuple member name inference, default expression, pattern matching with generics.
- C# 7.2 released with VS2017 v15.5 (November 2017) Minor new features: private protected access modifier, Span<T>, aka interior pointer, aka stackonly struct, everything else.
来源 https://stackoverflow.com/questions/247621/what-are-the-correct-version-numbers-for-c