Occurs before the Collection Source's collection has been recreated.
public event EventHandler CollectionChanging
Public Event CollectionChanging As EventHandler
The CollectionChanging event handler receives an argument of the EventArgs type.
This event is raised in the CollectionSourceBase.ResetCollection method, before recreation of the Collection Source's collection takes place. Handle the CollectionChanging event to be notified when the Collection Source's collection is about to be recreated.