public CauHoi_BAL_DLL() { db = new DB_QLTracNghiemDataContext(); }
public GiaoVien_BAL_DLL() { db = new DB_QLTracNghiemDataContext(); }
public KetQua_BAL_DLL() { db = new DB_QLTracNghiemDataContext(); }
public CauHoi_BAL_DLL() { db = new DB_QLTracNghiemDataContext(); }
public GiaoVien_BAL_DLL() { db = new DB_QLTracNghiemDataContext(); }
public KetQua_BAL_DLL() { db = new DB_QLTracNghiemDataContext(); }