Regions in Prism Screencast
Regions in Prism are kind of like Master Pages. They allow us to have master and sub-views. If you're interested in composing views separately and then bringing them together in the running application, Regions are for you. As with all of the things in Prism, Regions are a part of the buffet. You can use them or not at your discretion.
This is a hyper-video screencast with embedded code. Brought to you by Silver Bay Labs where we do Silverlight Development.