partial void DeleteHD_Category(HD_Category instance);
 partial void UpdateHD_Category(HD_Category instance);
		private void detach_Category(HD_Category entity)
		{
			this.SendPropertyChanging();
			entity.ParentHD_Category = null;
		}
 partial void InsertHD_Category(HD_Category instance);
		private void attach_Category(HD_Category entity)
		{
			this.SendPropertyChanging();
			entity.ParentHD_Category = this;
		}