title: Extended WPF Toolkit - CheckComboBox
body: <p>Is anyone aware of a way to manually enable (turning on the tick) on the Check Boxes within the CheckComboBox for WPFToolkit?</p>
  
  <p>Unfortunately, the Items in the Combo-box are all strings.</p>
  
  <p>I'm trying to enable all flags when "Select All" checkbox is ticked.</p>