title: ViewData.Model in partial is null
body: <p>In my main page (call it <code>index.aspx</code>) I call  </p>
  
  <pre><code>&lt;%Html.RenderPartial("_PowerSearch", ViewData.Model);%&gt;
  </code></pre>
  
  <p>Here the <code>viewdata.model != null</code>
  When I arrive at my partial:</p>
  
  <pre><code>&lt;%=ViewData.Model%&gt;
  </code></pre>
  
  <p>Says <code>viewdata.model == null</code></p>
  
  <p>What gives?!</p>