title: webbrowser iframes open in default browser
body: <p>I've got the WebBrowser control to open links in my default browser like this:</p>
  
  <pre><code>private void webBrowser1_Navigating(object sender, WebBrowserNavigatingEventArgs e)
      {
          if (e.Url.ToString() != "about:blank")
          {
              e.Cancel = true;
              System.Diagnostics.Process.Start(e.Url.ToString());
          }
      }
  </code></pre>
  
  <p>This works great but if I load a document that contains some IFrame elements those will be opened in the system browser as well (mostly embedded stuff, like Google Maps, Digg icons, etc..).</p>
  
  <p>How do I keep iframes loading in the Webbrowser control and user clicked links in the system browser?</p>