Understanding the Role of Commanding in Silverlight 4 Applications

I’ve had the opportunity to give a lot of presentations on the Model-View-ViewModel (MVVM) lately both publicly and internally for companies and wanted to put together a post that covers some of the frequent questions I get on commanding.  MVVM relies on 4 main pillars of technology including Silverlight data binding, ViewModel classes, messaging and commanding. Although Silverlight 4 provides