C# version history and core features

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About C# Programming Language: features, syntax, usages and so on.

Version history

C# is my favorite programming language and has been evolving overtime. I have been programming with many other languages but C# is always my favorite because it is simple and easy to use. Visual Studio is the most powerful tool I’ve ever used. To me, programming efficiency and performance are the key factors.

infoThis page will not be updated any more. For C# language features, refer to the compiler dpcumentation: https://github.com/dotnet/roslyn/blob/master/docs/Language%20Feature%20Status.md.

With each major release, new language or compiler features are added together with framework and IDE updates.

This page summarizes the version history up to C# 8.0 to help you recap the core features you may have missed.

Version history

* .NET Version doesn’t necessarily indicate the mini version that the feature could work on. For example, some features are compiler features/syntactic sugar and the code can work on previous version after compilation.

C# Version	Visual Studio	.NET Framework Version	CLR Version	Core Features
1.0	VS2012 +	1.0 +	1	Managed code
2.0	VS2005 +	2.0 +	2	Generics Anonymous methods Nullable types
3.0	VS2008 +	3.5 +	2	Lambda expressions Extension methods Expression tree Anonymous types LINQ Implicit typing (var)
4.0	VS2010 +	4.0 +	4	Late binding (dynamic) Named arguments Optional parameters More COM support
5.0	VS2011 +	4.5 +	4	Async feature Caller information
6.0	VS2015 +	4.6 +	4	String Interpolation Read-only Auto-properties Auto-Property Initializers Expression-bodied function members using static Null - conditional operators Exception filters nameof Expressions await in catch and finally blocks index initializers Extension methods for collection initializers Improved overload resolution
7.0	VS2017 15.0 +	4.7 +	4	`out` variables Tuples Discards Pattern Matching `ref` locals and returns Local Functions `throw` Expressions Generalized async return types Numeric literal syntax improvements More expression-bodied members
7.1	VS2017 15.3+	4.7 +	4	`async` `Main` method `default` literal expressions Inferred tuple element names
7.2	VS2017 15.5+	4.7+	4	Reference semantics with value types Non-trailing named arguments Leading underscores in numeric literals `private protected` access modifier
7.3	VS2017 15.7+	.NET Core 2.1 .NET Core 2.2 .NET Framework 4.8	4	Detailed documentation: What's new in C# 7.3 Accessing fixed fields without pinning Reassigning ref local variables Using initializers on stackalloc arrays Using fixed statements with any type that supports a pattern Using additional generic constraints
8.0		.NET Core 3.x .NET Standard 2.1		Readonly members Default interface methods Pattern matching enhancements: Switch expressions Property patterns Tuple patterns Positional patterns Using declarations Static local functions Disposable ref structs Nullable reference types Asynchronous streams Asynchronous disposable Indices and ranges Null-coalescing assignment Unmanaged constructed types Stackalloc in nested expressions Enhancement of interpolated verbatim strings

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C# version history and core features

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Version history

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