I did this demo some time ago but never shared it and thought it would be a good idea to get it out to everyone. When I created it a few months back I was giving a session on WPF and I wanted to have a very simple example of composition. I couldn't really find one at the time and thus this demo was born.
What you need to get started:
Visual Studio 2008 Beta 2
PingBack from http://msdnrss.thecoderblogs.com/2007/10/30/simple-composition-with-windows-presentation-foundation-wpf/