title: How to show a Page inside MainWindow?
body: <p>In my MainWindow.xaml, I have a DockPanel that contains Menu, Page and Status Bar. I want to show this Page when an option is clicked from the Menu. The Page should appear as centered to the parent, MainWindow. This Page will be acting as a center place to show different Forms, i.e, User Controls, Content etc..</p>
  
  <p>I am not following how to add a reference in the Code-Behind .cs file of the MainWindow to show this Page.</p>