title: Passing TempData from action filter to action
body: <p>I've been trying to pass TempData from ActionFilter to the action using :</p>
  
  <pre><code>filterContext.Controller.TempData.Add("Key","Value");
  </code></pre>
  
  <p>However, it appears that no TempData is passed to the action as I keep getting the <code>Object not referenced to an instance of the object</code> error. </p>
  
  <p>Is this the right way to pass TempData to the controller from the ActionFilter ? if not, how can I do this ?</p>