private void detach_Track(Track entity)
		{
			this.SendPropertyChanging();
			entity.AttendeesCodeCampYear = null;
		}
		private void attach_Track(Track entity)
		{
			this.SendPropertyChanging();
			entity.Attendees = this;
		}
 partial void UpdateTrack(Track instance);
 partial void DeleteTrack(Track instance);
 partial void InsertTrack(Track instance);