title: Bring dialog window to front
body: <p>I am showing a window on a button click like this:</p>
  
  <pre><code>private void showWindow(object obj)
  {
      var dialog = new AddItemView();
      dialog.Show();
  }
  </code></pre>
  
  <p>If the button is clicked again, while this window is still open, how do I bring this window to the front and not create a new one?</p>