c# - How to add multiple records in List along with other model in view-model Linq - ASP.NET-MVC5 -

i working on asp.net-mvc5 applications. need pass data model multiple classes controller view decided use viewmodel , use linq assign values view model accordingly. model, student can have multiple emergency contact using list getting error on part in linq query.

viewmodel

public class studentdetailedprofileviewmodel {     public studentdetailedprofileviewmodel() { }      public student _studentmodel { get; set; }     public course _coursemodel { get; set; }     public school _schoolmodel { get; set; }     public campus _campusmodel { get; set; }     public contactdetail _contactdetailmodel { get; set; }     public list<emergencycontact> _emergencycontactmodel { get; set; }  } 

function need return typed binded data

 public studentcourseschoolandcampusviewmodel getcoursebystudentid(int _studentid)     {         try         {             using (var _uow = new studentprofile_unitofwork())             {                 var _record = (from _course in _uow.course_repository.getall()                               join _school in _uow.school_repository.getall() on _course.schoolid equals _school.schoolid                               join _campus in _uow.campus_repository.getall() on _course.campusid equals _campus.campusid                               _course.studentid == _studentid                               select new studentcourseschoolandcampusviewmodel  {_coursemodel= _course, _schoolmodel = _school, _campusmodel = _campus }).firstordefault();                  return _record;             }         }         catch { return null; }     } 

i have managed following not sure if best practice!!

    public studentdetailedprofileviewmodel getstudentdetailedprofilebystudentid(int _studentid)     {         try         {              using (var _uow = new studentprofile_unitofwork())             {                  studentdetailedprofileviewmodel studentprofileobject = new studentdetailedprofileviewmodel();                  var _profile = (from _student in _uow.student_repository.getall()                                 join _contactdetail in _uow.contactdetail_repository.getall() on _student.studentid equals _contactdetail.studentid                                 join _studentcourse in _uow.course_repository.getall() on _student.studentid equals _studentcourse.studentid                                 join _school in _uow.school_repository.getall() on _studentcourse.schoolid equals _school.schoolid                                 join _campus in _uow.campus_repository.getall() on _studentcourse.campusid equals _campus.campusid                                 _student.studentid == _studentid                                 select new studentdetailedprofileviewmodel { _studentmodel = _student, _contactdetailmodel = _contactdetail, _coursemodel = _studentcourse,_schoolmodel = _school, _campusmodel = _campus}).firstordefault();                  _profile._emergencycontactmodel = (from _emergencycontact in _uow.emergencycontact_repository.getall()                                                   _emergencycontact.studentid == _studentid                                                   select _emergencycontact).tolist();                   return _profile;                             }         }//         catch { return null; }      }