public static void Xoa(string masanpham, string mataikhoan)
{
using (var sql = new MobileShopConnectionDB())
{
var a = sql.Query <GioHang>("select * from GioHang Where MaTaiKhoan = '" + mataikhoan + "'and MaSP ='" + masanpham + "'").FirstOrDefault();
sql.Delete(a);
}
}