public PhieuThueBLL() { db = new QLCDDataContext(); }
public ChiTietPhieuDatBLL() { db = new QLCDDataContext(); }
public KhachHangBLL() { db = new QLCDDataContext(); }
public NhanVienBLL() { db = new QLCDDataContext(); }
public DanhMucBLL() { db = new QLCDDataContext(); }
public TieuDeBLL() { db = new QLCDDataContext(); }
public PhieuDatBLL() { db = new QLCDDataContext(); }
public TaiKhoanBLL() { db = new QLCDDataContext(); }
public DiaBLL() { db = new QLCDDataContext(); }