Using MvvmLight with (XAML) Silverligtht 4 or WPF

IntroductionThis tutorial will try and explain the advantages and the 'how to' of using MVVMLight within your XAML application. So that you can produce code that easier mantainable and more importantly testable. Why Use The MVVM PatternThe tight coupling of GUI to code behind has over the years meant that testing the code-behind can be some what tricky. In that how do you mimic the selected event