Where is the System.Net.Http.WebRequestHandler source code?

Question

To much fanfare it was announced that there was now a Roslyn powered index for the .NET Reference Source and that

The version of the framework that we currently have indexed is .NET framework 
version 4.5.1.

Yet when I go there to look at HttpClient code all I get are stubs and I cannot find any code for the bits that make it run like System.Net.Http.WebRequestHandler.

Where can I find this code and why hasn't it been included already?

Answer 1

I found the solution on blogs.msdn.com:

"The WebRequestHandler is not included in the System.Net.Http DLL but rather in System.Net.Http.WebRequest DLL so you have to explicitly include that as a reference in order to see it."