How to organize architecture WPF project?

In my WPF project i want to have only one Window - MainWindow and UserControls as working part. I have some little different applications in one, and want to make navigation on top of my MainWindow as buttons. And little applications as UserControl. In MainWindow - grid with Big Empty Zone - which use to keep and run work. But, i want to navigate to other userControl from another. (probably do not understand :()

How organize architecture WPF project that: one main window and many user开发者_开发百科controls which places in mainwindow and replace each other in turn. and there is the possibility of navigating from another usercontrol to another.

May be it's MVVM, but i don't understand how this pattern can help me.

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You might be interested in the ViewModel sample application of the WPF Application Framework (WAF) project.

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My best source is here. Its the place that got me started on my journey to MVVM. Full working examples and workable solutions.

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• http://compositewpf.codeplex.com/Wikipage - I was looking for it in past and it's the only thing I've found so far.

• How to design parts of the application in XAML and how to reusing it then?