Load multiple UserControls on WPF window

Question

I have a Window on which I load an UserControl say Control1. Now if the user clicks on a certain button a new UserControl, Control2 should be loaded on the Window and Control1 s

Answer 1

Put a ContentPresenter in the MainWindow like this:

and then in the ViewModel

public ViewModelBase ActiveWidget {get;set;} // Don't forget INotifyPropertyChanged!!

then you must create a DataTemplate for each ViewModel with an appropiate instance of the UserControls. See This Article for a generic solution to this.