Where can I find source code for .net CLR and C#?

Question

Is the source code for Microsoft .net CLR and C# open? If yes, where can I download/browse it?

Answer 1

Part of .NET Core is now open-source, starting with .NET Core 5.0.
Here is the project site: http://www.dotnetfoundation.org/netcore5
Here is the code: https://github.com/dotnet/corefx

Answer 2

for BCL you can check here (codeplex)

and for the CLR it self here (githup)

Answer 3

While I'm not intimately familiar with the licensing of Microsoft's available source code, there is at least one implementation of the CLR and C# compiler that is open source -- Novell's Mono.

http://www.mono-project.com/

Answer 4

You can download the source code of .NET with the help of Netmassdownloader

Answer 5

You can use Reflector to view them.

Or, if you have Resharper 5 installed, you can download the source code for viewing purpose.

_{(source: jetbrains.com)}

But no, it is not open source, despite that you can download and view the source code.

Answer 6

You can have a look at the official one: Microsoft Reference Source.

You can browse the source code in Visual Studio as well, while debugging. To enable this feature, follow the steps described here: Configure Visual Studio 2013 for debugging .NET framework