title: Is it possible to bind a WPF control to multiple data contexts?
body: <p>I've written an UserControl whose DataContext contains a collection and an bool property. The collection is being displayed (and editited) within a data grid, which has custrom column templates. The DataContext of a control in a column is of course an item of the collection of the UserControl's DataContext. However I need to bind one property of the control in a column to the bool property of the UserControl's DataContext and not to the collection item.</p>
  
  <p>Do you have any ideas on how to solve this?</p>
  
  <p>Best Regards, Oliver</p>