Is ASP.NET Web Forms source code available for download anywhere?

Question

I noticed this site http://aspnetwebstack.codeplex.com/. Is web forms source available?

Answer 1

No, it isn't. Only ASP.NET MVC 4, Web API and Razor 2 as Scott Gu explained in his blog post.

Scott Hanselman answers your question:

Why isn't ASP.NET Web Forms open sourced?

The components that are being open sourced at this time are all components that are shipped independently of the core .NET framework, which means no OS components take dependencies on them. Web Forms is a part of System.Web.dll which parts of the Windows Server platform take a dependency on. Because of this dependency this code can't easily be replaced with newer versions expect when updates to the .NET framework or the OS ships.