My version of Jason Dollinger's demonstration code

I saw this post. It refers to a video where Jason Dollinger creates a small program with the help of a pattern called model-view-viewmodel (m-v-vm). Some people wrote in the comments to this post that they wanted the source code of the program that was created in this video. I thought it would be nice to recreate the program as a way of learning about this pattern. After I wrote it I thought it would be nice to share it with you. I haven't implemented the unity framework yet. But I already have used the MEF library in other programs. So I probably will write an update of this program in the future where the MEF framework is used. Because I wrote the program in Visual Studio Express no unit testing is included. You can download the file here. If you have any comments or suggestions please let me know!