title: WPF application stops interacting on screen rotate
body: <p>We have a WPF app which runs fine, but a user reported that it locks up when the screen is rotated.  (Tablets will do that!)</p>
  
  <p>The app actually renders fully after the rotate but stops responding to the mouse/keyboard.  It doesn't show as 'non-responding' in a Windows sense.</p>
  
  <p>We can simulate the "lock up" here, but debugging this is odd:</p>
  
  <ul>
  <li>Lock up does not occur while in VS debugger</li>
  <li>If you try and attach to the locked up process, VS says the process was built without debug information</li>
  <li>Before the lockup VS can attach/deattach to the same EXE process</li>
  </ul>
  
  <p>We have put trace outputs in global unhandled exceptions but nothing is fired.</p>
  
  <p>I can only think of one next step to debug which is start to hack out chunks of code and find the breaking area.</p>
  
  <p>Anyone seen this before or got any suggestions?</p>
  
  <p>Thanks!</p>