The event handler receives an argument of type System.Collections.Specialized.NotifyCollectionChangedEventArgs containing data related to this event. The following NotifyCollectionChangedEventArgs properties provide information specific to this event.
| Property | Description |
|---|
| Action | Gets the description of the action that caused the event. |
| NewItems | Gets the items affected by an action. |
| NewStartingIndex | Gets the index at which the change occurred. |
| OldItems | Gets the item affected by a System.Collections.Specialized.NotifyCollectionChangedAction.Replace or System.Collections.Specialized.NotifyCollectionChangedAction.Remove action. |
| OldStartingIndex | Gets the index at which the change occurred for a System.Collections.Specialized.NotifyCollectionChangedAction.Replace or System.Collections.Specialized.NotifyCollectionChangedAction.Remove action. |