partial void DeleteSANPHAM(SANPHAM instance);
 partial void UpdateSANPHAM(SANPHAM instance);
 partial void InsertSANPHAM(SANPHAM instance);
		private void detach_SANPHAMs(SANPHAM entity)
		{
			this.SendPropertyChanging();
			entity.DANHMUC = null;
		}
		private void attach_SANPHAMs(SANPHAM entity)
		{
			this.SendPropertyChanging();
			entity.DANHMUC = this;
		}