Microsoft MVP’s Shoban Kumar Client Application Development MVP and Vinod Unny Windows Desktop Experience MVP have open sourced Application developed by them. Open Source applications will be very useful for those who want to learn by example. These two applications along with their source code are available at these MVP’s respective sites.
Codeplex also provides a lot of open source snippets where developers can work and enhance the applications created by other developers.
Source : Open Source Code Snippets by MVP’s