http://www.open-open.com/doc/view/29a6b91b43ed41709d306994f625cc8b
http://patterns.cs.up.ac.za/
C# 3.0 Design Patterns
Use the Power of C# 3.0 to Solve Real-World Problems
Publisher: O'Reilly Media
Released: December 2007
Pages: 318
examples @ http://patterns.cs.up.ac.za/examples.shtml
http://shop.oreilly.com/product/9780596527730.do