private void SuaSachTrongKho_Load(object sender, EventArgs e)
{
Class.XuLyThuVien KiemTra = new Class.XuLyThuVien();
Class.Sach Book = KiemTra.InfoSach(MaSach_FormMain);
lblMaSach.Text = Book.MaSach;
txtTenSach.Text = Book.TenSach;
UpDownSL.Value = Book.SoLuong;
}
