On April 3rd 2014 (second day of //BUILD 2014) Microsoft released a new preview version of “Roslyn”, with an official name: .NET Compiler Platform. which will be part of the next version of .NET and Visual Studio, but you can try it right now on top of VS 2013.
We just announced http://referencesource-beta.microsoft.com
You now can:• Debug into .NET framework source in Visual Studio (better than before)• Download the source with .sln and project files, so you can open and browse in Visual Studio• Browse the source online
For a tutorial,