In Part 1, I showed how to create a very simple modular WPF application, and introduced MEF to allow us to easily add modules without changing any existing code.
In part 2, I introduce the MVVM pattern to show how we can make our applications more easily unit testable, by separating the view from the business logic. I also create some unit tests using the Microsoft unit testing framework and moq, and show how to perform code coverage analysis.
Incidentally, I normally use NUnit and TestDriven.NET instead of the Microsoft unit testing framework, which I find much simpler to use, and also supports code coverage analysis using NCover or the Visual Studio code coverage.
I do plan to follow this up with a third video, in which I replace the modules ListBox with some buttons to switch modules and show some of the typical problems you might run into when using MVVM.