My Good Friend Andrew Whiddett, CTO of IdentityMine wrote a great solution to be able to make Custom RoutedEvents available in Silverlight (currently custom RoutedEvents are only available in WPF). RoutedEvents as you may or may not know, are the backbone of what makes the Model View View Model development pattern work. Now, because of Andrew’s genius you can use it in Silverlight too!
Here is a link to the video showing you exactly how to use it: http://tw0.us/4oC
The URL to the dll: http://tw0.us/4cS
The URL to my project: http://tw0.us/4cT
Have fun and Enjoy! And a Special thanks to my good friend and former mentor, Andrew Whiddett.