partial void Deletetbl_chitietphieu(tbl_chitietphieu instance);
 partial void Updatetbl_chitietphieu(tbl_chitietphieu instance);
		private void detach_tbl_chitietphieus(tbl_chitietphieu entity)
		{
			this.SendPropertyChanging();
			entity.tbl_sach = null;
		}
 partial void Inserttbl_chitietphieu(tbl_chitietphieu instance);
		private void attach_tbl_chitietphieus(tbl_chitietphieu entity)
		{
			this.SendPropertyChanging();
			entity.tbl_phieumuon_tra = this;
		}