title: Writing to Output Stream from Action
body: <p>For some strange reasons, I want to write HTML directly to the Response stream from a controller action.
  (I understand MVC separation, but this is a special case.)</p>
  
  <p>Can I write directly into the <code>HttpResponse</code> stream? In that case, which <code>IView</code> object should the controller action should return? Can I return 'null'?</p>