public ActionResult TrangThaiDangKy()
        {
            List <RegistrationInterviewStatusRegistedCountDTO> registration = registrationInterviewRepository.GetSoluongDangkyTheoViTriUngTuyen();
            List <MonDuTuyen> mondutuyens  = monDuTuyenRepository.GetMonDuTuyens();
            var registrationRegistedStatus = (from s1 in registration join s2 in mondutuyens on Convert.ToInt32(s1.ViTriUngTuyen) equals s2.Id select new RegistrationInterviewStatusRegistedCountDTO {
                ViTriUngTuyen = s2.ViTriUngTuyen.Name + " " + s2.Name, Quantity = s1.Quantity, Targets = s2.Targets
            });

            //var registrationRegistedStatus = (from p in mondutuyens from s in registration where Convert.ToInt32(s.Quantity) == p.Id select new RegistrationInterviewStatusRegistedCountDTO { ViTriUngTuyen = p.ViTriUngTuyen.Name + " " + p.Name, Quantity = s.Quantity, Targets = p.Targets });
            //var b = (from s1 in mondutuyens join s2 in registration on s1.Id equals Convert.ToInt32(s2.ViTriUngTuyen) select new RegistrationInterviewStatusRegistedCountDTO { ViTriUngTuyen = s1.ViTriUngTuyen.Name + " " + s1.Name, Quantity = 0, Targets = s1.Targets } );
            var b = from s1 in mondutuyens where !registration.Any(s => Convert.ToInt32(s.ViTriUngTuyen) == s1.Id) select new RegistrationInterviewStatusRegistedCountDTO {
                ViTriUngTuyen = s1.ViTriUngTuyen.Name + " " + s1.Name, Quantity = 0, Targets = s1.Targets
            };
            var ab = registrationRegistedStatus.Concat(b).OrderBy(s => s.ViTriUngTuyen);

            ViewBag.RegistrationStatus = ab;
            return(View());
        }