title: Change nodes of treeview
body: <p>i have a treeview like this below<br>
  i use c# for winform programming</p>
  
  <ol>
  <li>MONITOR<br>
  <ul>
  <li>LG</li>
  <li>Samsung</li>
  <li>HP</li>
  </ul></li>
  <li>KEYBOARD<br>
  <ul>
  <li>HP</li>
  <li>Dell<br>
  <ul>
  <li>Black</li>
  <li>White</li>
  </ul></li>
  </ul></li>
  <li>MOUSE</li>
  </ol>
  
  <p>so can u tell me how can i programmically change places of 1st and 2nd nodes in this example.</p>