Is it possible to dispose of user control in WPF?

Question

Is it possible to dispose of a unmanaged user control - say - after a tab is closed?

 

We set a Document Panel from Dev Express and the .Content property to:

 

TestControl = Activator.CreateInstance(matchingControlName, new Object[] { stringParam }) as UserControl;

And when they close the tab, I want to fully remove this user control from memory.