title: Shared DataSource between combobox and textbox
body: <p>I have this three controls:</p>
  
  <p><code>ComboBox</code>: list of myobject          </p>
  
  <p><code>TextBox</code>: view a description</p>
  
  <p><code>DataSource</code>: list(of MyObject)</p>
  
  <p>MyObject:</p>
  
  <ul>
  <li><p>property id as int</p></li>
  <li><p>property combodesctription as string</p></li>
  <li><p>property description as string</p></li>
  </ul>
  
  <p>I want to select an element on the combobox and see the selected object description into the TextBox.</p>
  
  <p>How can I do that ?</p>