title: WPF Datagrid lost focus when refresh my collection
body: <p>When key press "F5"</p>
  
  <p>I refresh my collection <code>colecao.View.Refresh();</code></p>
  
  <p>...and lost focus of my datagrid</p>
  
  <p>To back focus in row of datagrid I try this: </p>
  
  <ol>
  <li><code>Focus()</code> on datagrid</li>
  <li><code>FocusManager.SetFocusedElement</code></li>
  <li><code>row.Focus()</code></li>
  <li>......</li>
  </ol>