Quality C# (C sharp) Code Examples

One can learn a lot from looking other peoples code. Especially if the code is well crafted. I am not sure how to find well crafted code but here I will list sources for c# codes that I can find:

C# projects on CodePlex
C# Projects on GitHub
C# Code Samples on Google Code
Visual C# Code Samples on MSDN
http://www.icsharpcode.net/ (Open source projects for .NET)