title: PreviousPage.Property is Nothing
body: <p>I have a Default.aspx page which has some Public ReadOnly Properties that get their values from HiddenFields on the page. The page is eventually redirected to Users/Main.aspx. On Main.aspx I have a @ PreviousPageType reference with a VirtualPath parameter set to "~/Default.aspx". In the codebehind to Main.aspx I have </p>
  
  <pre><code>lb_Username.Text = PreviousPage.Username
  </code></pre>
  
  <p>When I run in debug the system complains that PreviousPage = Nothing</p>
  
  <p>What have I done wrong? More code can be supplied if necessary.</p>