title: When Is ScriptManager/ScriptManagerProxy Required?
body: <p>I don't think I've been able to find a definitive answer on this, so I'll ask it here.  When is a ScriptManager (or ScriptManagerProxy in the case of using a ScriptManager on a Master Page) needed?</p>
  
  <p>For example, let's say that I have a ScriptManager on a MasterPage:</p>
  
  <ol>
  <li><p>If I have a Web Content Form that contains an UpdatePanel, does it need a ScriptManagerProxy?</p></li>
  <li><p>If I have a Web Content Form that contains a User Control and that User Control has an UpdatePanel in it, does the User Control need a ScriptManagerProxy?</p></li>
  <li><p>If I have a Web Content Form that contains an UpdatePanel and a UserControl that also contains an UpdatePanel, does the Web Content Form and/or the User Control require a ScriptManagerProxy?</p></li>
  </ol>
  
  <p>Thanks.</p>