Is the source code open for Microsoft.net CLR and C #? If so, where can I download / view it?
You can download .NET source using Netmassdownloader
You can use Reflector to view them.
Or, if you have Resharper 5 installed, you can download the source code for viewing.
(source: jetbrains.com )
But no, this is not open source, despite the fact that you can download and view the source code.
The .NET Core part is now open source, starting with .NET Core 5.0.Here is the project website: http://www.dotnetfoundation.org/netcore5Here is the code: https://github.com/dotnet/corefx
While I'm not familiar with licensing Microsoft source code, there is at least one implementation of the CLR and C # compiler, which is open source - Novell Mono.
http://www.mono-project.com/
You can see the official: Microsoft reference source .
You can also view the source code in Visual Studio when debugging. To enable this feature, follow these steps: Configure Visual Studio 2013 to debug the .NET framework
for BCL you can check here (codeplex)
and for CLR - self here (githup)