RevitAPIPreEventArgs.Cancel
Description:
When the event is cancellable, may call the Cancel() method to cancel it.
When the event is cancellable, may call the Cancel() method to cancel it.
Remarks:
Not every event is cancellable. Whether or not an event may be cancelled is indicated by IsCancellable() method.
Not every event is cancellable. Whether or not an event may be cancelled is indicated by IsCancellable() method.
public void Cancel()