Framework design guidelines : conventions, idioms, and patterns for reusable .NET libraries

This book is an absolute must-read for all .NET developers.

It gives clear do and don't guidance on how to design class libraries for .NET.

It also offers insight into the design and creation of .NET that really helps developers understand the reasons why things are the way they are.

This information will aid developers designing their own class libraries and will also allow them to take advantage of the .NET class library more effectively.