title: UWP Listview CheckBox when SelectionMode.Multiple - What does it bind too?
body: <p>When I set my ListView to SelectionMode.Multiple the default checkbox appears as it should - what value does this bind too?</p>
  
  <p>I'm wanting this box to be either checked or unchecked depending on a value I'm setting. I cant find any references to what this default checkbox responds too.
  Thanks</p>