The RadListBox is an ItemsControl. Almost all of the exposed events are inherited from the ItemsControl class. RadListBox adds an additional event:
SelectionChanged - occurs when the selected item is changed. The SelectionChanged event handler receives two arguments:
The sender argument contains the RadListBox. This argument is of type object, but can be cast to the RadListBox type.
A SelectionChangedEventArgs object which has the following properties:
AddedItems - gets a list that contains the items that were selected.
RemovedItems - gets a list that contains the items that were unselected.