Great framework design blogs
is leading the effort to develop, promote, and apply the design guidelines to the .NET Framework. He is a coauthor of Framework Design Guidelines (Addison-Wesley, 2005).
He has very large number of precious posts covering various subjects related to application framework design.
was a founding member of both the Common Language Runtime, and .NET Framework teams at Microsoft Corporation where he is currently the Group Program Manager for the UI Framework and Services team
Have to for every developer and solution architect working on application framework level of development