[C#] Creating Custom Attached Properties

I'd been looking into creating custom attached properties to xaml elements so that I could store relative information regarding our "Object Linking" that will need to be implemented in my project. The concept was a little muddled to me, and I came close to getting it working last Friday, I was just missing a key step!

This is the HOW-TO article that helped me get it all together this morning:
Attached-Properties-in-Silverlight