BRSQUIRRL (69271) writes "Microsoft has announced the release of a large portion of the source code for the
.NET Framework class libraries, including the base System classes as well as the ADO.NET database, ASP.NET web, and Windows Forms namespaces, among many others. Instructions are available on how to enable access to this code (including step-into debugging support) from Visual Studio 2008. Access to the code is granted under a "read-only reference license". From Scott Guthrie's blog:
"We think that enabling source code access and debugger integration of the
.NET Framework libraries is going to be really valuable for .NET developers. Being able to step through and review the source should provide much better insight into how the .NET Framework libraries are implemented, and in turn enable you to build better applications and make even better use of them.