Wading into MVVM

1. Commands rather than Events
• instead of event handlers, think in terms of firing commands that will find their way to the corresponding command properties declared on ViewModels
• i.e. use Command attribute of XAML widgets rather than Click event handler
• MVVM popularized class RelayCommand works well as a lightweight ICommand implementation to use on ViewModels
• or barring that, use the Expression Blend Interactivity DLL to map click events to Model object methods via "CallMethodAction" behavior