private PhieuPhatHanhDao() { db = new VeSoDbContext(); }
private PhieuThuDao() { db = new VeSoDbContext(); }
private PhieuDangKyDao() { db = new VeSoDbContext(); }
private CongNoDao() { db = new VeSoDbContext(); }
private DaiLyDao() { db = new VeSoDbContext(); }
private GiaiThuongDao() { db = new VeSoDbContext(); }
private GiaVeSoDao() { db = new VeSoDbContext(); }