I'm trying to get up to speed on WPF and MVVM and as I have learned that I need to start using the model view view model pattern I've ran into what shoul dbe a basic problem with getting the xamGrid to display the data from the ViewModel.  I've recreated my issue in a small basic project that roughly implements MVVM.   I cannot get the grid to display anything and I cannot get the binding debugger to hit.

I must be missing something basic but have no idea what it is.