title: Close current UserControl
body: <p>I have a Window1.xaml main Window; and after some event, I display a UserControl EditFile.xaml.</p>
  
  <p>The code behind is:</p>
  
  <pre><code>public static int whichSelected = -1;
  private void button1_Click(object sender, RoutedEventArgs e)
  {
      //searchEditPanel.Children.Clear();
      whichSelected = listViewFiles.SelectedIndex;
      searchEditPanel.Children.Add(_EditFileControle);        //this is Grid
  }
  </code></pre>
  
  <p>And now, how can I close the opened/added UserControl from its content by clicking a Cancel button or something like that?</p>