title: WPF Remove ScrollViewer from TreeView
body: <p>I was wondering if it is possible to turn off the TreeView's ScrollViewer easily.  </p>
  
  <p>I have a UserControl with a Grid. One of the Cells has a few TreeViews inside a Stackpanel. The height of the Control sizes automatically depending on the height of the TreeViews, so there is no need for a scrollbar.  </p>
  
  <p>The problem is: I have a bunch of these in a ListBox with its own ScrollViewer, but when i am using the MouseWheel, scrolling stops when you are over a TreeView.  </p>
  
  <p>This is because the TreeView has its own ScrollViewer which steals the MouseWheel. I know this is probably possible by overriding the control template, but I hope there is an easier way.</p>