Inheritance: INotifyPropertyChanging, INotifyPropertyChanged
 partial void DeleteAttendee(Attendee instance);
 partial void UpdateAttendee(Attendee instance);
		private void detach_Attendees(Attendee entity)
		{
			this.SendPropertyChanging();
			entity.User = null;
		}
 partial void InsertAttendee(Attendee instance);
		private void attach_Attendees(Attendee entity)
		{
			this.SendPropertyChanging();
			entity.User = this;
		}