Scott Guthrie announces today that Microsoft will offer “the ability for .NET developers to download and browse the source code of the .NET Framework libraries, and to easily enable debugging support in them” later this year.

According to Daniel Moth

The cool bit is not that you can just read the framework code in your favourite text editor once you download and accept the license; no, the real goodness is that when you debug your applications with Visual Studio 2008 you will have the option to debug right down into the Framework code (with an autodownload feature from an MSDN server)!

Scott Hanselman has a Podcast on the topic and Channel9 will be publishing a video at the end of the week.

http://weblogs.asp.net/scottgu/archive/2007/10/03/releasing-the-source-code-for-the-net-framework-libraries.aspx