Read original post at Joe Mayo's Blog
Composition is an integral part of Windows 8 UI design from both aesthetic and logical perspectives. This post modified my previous post, Refactoring Windows 8 Code-Behind to MVVM. adding to the variety of compositional examples. I’ll start with an explanation of composition in Windows 8, modify the previous code to show the power of composition, and then highlight a few more existing examples of where composition naturally fits into the Windows 8 UI environment.