title: Displaying a control over other controls in a grid in WPF
body: <p>I am developing a WPF application.<br>
  Main window's child controls are contained in a grid.<br>
  The bottom row contains a status bar.  </p>
  
  <p>The application must notify the user.<br>
  I want to programmatically display a notification in a user control in the bottom right corner of the main window.<br>
  I want the notification user control to be displayed over the status bar and the control in the above row.  </p>
  
  <p>How can I display a control over other controls contained in a grid ?<br>
  Any help will be greatly appreciated</p>