title: VB System.NullReferenceException was unhandled by user code
body: <p>Here is the code:</p>
  
  <pre><code>Private Sub GeckoWebBrowser1_Navigated(sender As Object, e As Gecko.GeckoNavigatedEventArgs) Handles GeckoWebBrowser1.Navigated
      ToolStripTextBox1.Text = GeckoWebBrowser1.Url.OriginalString
      **Parent.Text = GeckoWebBrowser1.Site.Name.ToString** 
      ''GeckoWebBrowser1.DocumentTitle.ToString
      ''GeckoWebBrowser1.Site.Name.ToString()
  End Sub
  </code></pre>
  
  <p>If i start program VB say me System.NullReferenceException was unhandled by user code on bold line.</p>