ViewModel in MVC ASP.net

namespace edmxproject2.Models.ViewModels
{
    public class DoctorViewModel
    {
        public int DoctorID { get; set; }
        public string DName { get; set; }
        public int SelectedValue { get; set; }
        public virtual city city { get; set; }

        [DisplayName("City Name")]
        public virtual ICollection<city> cities { get; set; }
    }
}

public partial class Doctor
   {
       public Doctor()
       {
           this.Doctor_specialization = new HashSet<Doctor_specialization>();
           this.patients = new HashSet<patient>();
           this.recepionists = new HashSet<recepionist>();
       }

       public int DoctorID { get; set; }
       public string DName { get; set; }
       public Nullable<bool> Dgender { get; set; }
       public Nullable<System.DateTime> DDOB { get; set; }
       public string Demail { get; set; }
       public string DhighSchool { get; set; }
       public string DMedicalCollege { get; set; }
       public string Daddress { get; set; }
       public string DwebLink { get; set; }
       public string Dexperience { get; set; }
       public Nullable<System.DateTime> DgraduationYear { get; set; }
       public Nullable<System.TimeSpan> DinTime { get; set; }
       public Nullable<System.TimeSpan> DoutTime { get; set; }
       [ForeignKey("city")]
       public Nullable<int> DCityID { get; set; }
       public Nullable<int> UserID { get; set; }

       public virtual city city { get; set; }
       public virtual ICollection<Doctor_specialization> Doctor_specialization { get; set; }
       public virtual user user { get; set; }
       public virtual ICollection<patient> patients { get; set; }
       public virtual ICollection<recepionist> recepionists { get; set; }
   }

public partial class city
    {
        public city()
        {
            this.Doctors = new HashSet<Doctor>();
            this.patients = new HashSet<patient>();
        }

        public int CityID { get; set; }
        public string cityname { get; set; }

        public virtual ICollection<Doctor> Doctors { get; set; }
        public virtual ICollection<patient> patients { get; set; }

    }