partial void UpdateSanPham(SanPham instance);
 partial void DeleteSanPham(SanPham instance);
 partial void InsertSanPham(SanPham instance);
		private void detach_SanPhams(SanPham entity)
		{
			this.SendPropertyChanging();
			entity.QuanHuyen = null;
		}
		private void detach_SanPhams(SanPham entity)
		{
			this.SendPropertyChanging();
			entity.LoaiSanPham = null;
		}
		private void attach_SanPhams(SanPham entity)
		{
			this.SendPropertyChanging();
			entity.LoaiSanPham = this;
		}
		private void detach_SanPhams(SanPham entity)
		{
			this.SendPropertyChanging();
			entity.CongTrinh = null;
		}