What is this ViewModel?

Now I will explain a little bit about MVVM. MVVM is an architectural pattern. It stands for Model View ViewModel. Wikipedia has a decent explanation about it (http://en.wikipedia.org/wiki/Model_View_ViewModel)

The way I view MVVM is like this. It separates the Data(Model), from the presentation(View) and the ViewModel handles updating the Data when something changes on the View. It is useful, but I also feel if you are doing simple little apps you don't need to use MVVM as it just takes up to much time and resources. But it is still a good thing to know and understand.

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