WPF MVVM Shell Styling Tips
General Styling Tips
There is a complete CODE Magazine article on creating styles and themes. Take a look at it here: http://www.codemag.com/article/1211091
Showing the Selected View
There are SelectedNormalViewResult and SelectedTopLevelViewResult properties on the Shell object so one can easily bind a content control to whatever view is currently open, rather than always binding to all open views.
This can now be done like so in the Shell style:
<ContentControl Content="{Binding SelectedNormalViewResult.View}" />
That one shows the selected normal view. If you want to show the current top-level (popup) view, it can be done like so:
<ContentControl Content="{Binding SelectedTopLevelViewResult.View}" />