public string Get(
            int numItemsPerPage,
            GetPaginationType GetPaginationType,
            int?Id             = null,
            string keyBoundary = null
            )
        {
            var Session = HttpContext.Current.Session;

            if (!Session.isAdminSession())
            {
                return("");
            }

            if (Id != null)
            {
                var User = (new Entities()).TaiKhoan.Where(p => p.id == Id).Select(u => new {
                    Email    = u.TenDangNhap,
                    Fullname = u.Ten,
                    State    = u.TrangThai,
                    Id       = u.id,
                    u.LaAdmin,
                });

                return(JsonConvert.SerializeObject(
                           new { data = User }
                           ));
            }

            if (GetPaginationType == GetPaginationType.Next)
            {
                return(JsonConvert.SerializeObject(Account_BUS.getNext(
                                                       keyBoundary,
                                                       numItemsPerPage)));
            }

            else
            {
                return(JsonConvert.SerializeObject(Account_BUS.getPrev(
                                                       keyBoundary,
                                                       numItemsPerPage)));
            }
        }
        public string Get(
            int numItemsPerPage,
            GetPaginationType GetPaginationType,
            int?Id             = null,
            string keyBoundary = null
            )
        {
            var Session = HttpContext.Current.Session;

            if (!Session.isAdminSession())
            {
                return("");
            }

            if (Id != null)
            {
                var Group = (new Entities()).Nhoms.Where(p => p.id == Id).Select(u => new {
                    Name  = u.Ten,
                    Id    = u.Ten,
                    State = u.TrangThai
                });

                return(JsonConvert.SerializeObject(
                           new { data = User }
                           ));
            }

            if (GetPaginationType == GetPaginationType.Next)
            {
                return(JsonConvert.SerializeObject(Group_BUS.getNext(
                                                       keyBoundary,
                                                       numItemsPerPage)));
            }

            else
            {
                return(JsonConvert.SerializeObject(Group_BUS.getNext(
                                                       keyBoundary,
                                                       numItemsPerPage)));
            }
        }