title: ASP.NET User Control Inheriting from User Control Generates Null Reference
body: <p>This must be a common problem.</p>
  
  <ul>
  <li>User control A has a TextBox T.</li>
  <li>User control B inherits from user control A.</li>
  <li>User control B is placed onto page P.</li>
  </ul>
  
  <p>During the Page_Load event of page P, if you attempt to access TextBox T, you'll find it's null.</p>
  
  <p>Is there an elegant solution for this?</p>