See Appendix A, MVVM Frameworks for a list of frameworks.
We are now going to update our code to use the MVVM Light framework by following the steps mentioned next:
If you haven't downloaded the MVVM Light framework then download the framework. See Chapter 2, Introduction to MVVM for details. Also note that there is now an MVVM Light Nuget package (http://nuget.org/packages/mvvmLight) available, which would be the preferred way to install the framework..
Add browse reference from
MainWindowViewModel.cs, add a using statement for