title: Setting ViewData item in a Partial to be read in a View
body: <p>I have a View which I call RenderPartial.</p>
  
  <p>In the Partial usercontrol I set <code>ViewData["IsTextAreaVisible"] = true;</code></p>
  
  <p>In my View after the call to <code>RenderPartial</code> I check the value of <code>ViewData["IsTextAreaVisible"]</code>.</p>
  
  <p>Even though the usercontrol had set it, the View thinks that it is null.</p>
  
  <p>Is this a bug or is there a better approach?</p>
  
  <p>Thanks</p>