partial void DeleteTracking(Tracking instance);
 partial void UpdateTracking(Tracking instance);
		private void detach_Trackings(Tracking entity)
		{
			this.SendPropertyChanging();
			entity.User = null;
		}
 partial void InsertTracking(Tracking instance);
		private void attach_Trackings(Tracking entity)
		{
			this.SendPropertyChanging();
			entity.User = this;
		}