title: WP8 root frame change
body: <p>Am trying to change root frame in code behind:</p>
  
  <pre><code>    // Do not add any additional code to this method
      private void CompleteInitializePhoneApplication(object sender, NavigationEventArgs e)
      {
          // Set the root visual to allow the application to render
          if (RootVisual != RootFrame)
          {
              RootVisual = RootFrame; // here or somewhere before ...               
          }
  </code></pre>
  
  <p>... I need to change the root frame (but no in manifest).
  Has anyone any idea? Answers or tips are very appreciated.</p>