It should be clear at this point that MVVM-based applications have a lot of elements in common, such as change notifications and commands. It would be beneficiary to create a reusable framework that we can simply leverage in many applications. Although there are several good frameworks out there (most are free), building such a framework ourselves will enhance our understanding and may prove easier to extend than other frameworks, which we may be less familiar with.
Make sure Visual Studio is up and running.
We'll create a reusable class library to serve as a basis of a simple MVVM framework and use it (and extend it) in later recipes:
UserControlClass Library project ...