UIApplication Application Closing Event

public event EventHandler<ApplicationClosingEventArgs> ApplicationClosing

Public Event ApplicationClosing As EventHandler(Of ApplicationClosingEventArgs)

public:
 event EventHandler<ApplicationClosingEventArgs^>^ ApplicationClosing {
	void add (EventHandler<ApplicationClosingEventArgs^>^ value);
	void remove (EventHandler<ApplicationClosingEventArgs^>^ value);
}

member ApplicationClosing : IEvent<EventHandler<ApplicationClosingEventArgs>,
    ApplicationClosingEventArgs>

Value

This event is raised when the Revit application is just about to be closed.

Event is not cancellable. The 'Cancellable' property of event's argument is always False.

No document may be modified at the time of the event.

The sender object of this event is UIControlledApplication object.

Reference