Head First Design Patterns Samples in C#
Good books are rare. One of them is surly O'Reillys Head First Design Patterns. Although the samples are written in Java it should not be a problem to translate them into C#. You can find a zip file with all the samples on http://www.msquaredweb.com/DesignPatterns/.
The book is also available in German language, with funny translations. For those of you who speak german: Would you translate StarBucks Cafe into "Sternback Kaffee" ?