title: Getting notified if a dll is added to GAC
body: <p>I have an app which is using a dll loaded from the GAC.
  If the dll is updated / a new version added, I would like my app to know; so it can load the new version (in an App Domain).</p>
  
  <p>It is possible to ask the OS to notify if a file is added to a watched folder.</p>
  
  <p><strong>Is it possible to be notified, in a similar way to a folder watch, if a dll is added to the GAC?</strong></p>