种子方法不播种

我的seed方法没有显示任何错误，但在我从PMC运行update-database之后，它肯定没有播种任何东西。由于数据库的整体结构和Identity的使用，我的问题非常具体。到目前为止，Seed方法看起来是这样的:

protected override void Seed(ApplicationDbContext context)
    {
        if (!context.Users.Any())
        {
            var userStore = new UserStore<ApplicationUser>(context);
            var userManager = new UserManager<ApplicationUser>(userStore);
            var user = new ApplicationUser()
            {
                FirstName = "Prvi",
                LastName = "Doktor",
                DateOfBirth = new DateTime(1977, 4, 3),
                EmploymentStatus = EmploymentStatus.Employed,
                PhoneNumber = "062/062-062",
                Email = "prvi@gmail.ocami",
                Address = "Kulovica 9",
                DateCreated = DateTime.Now,
                EmailConfirmed = true,
            };
            userManager.Create(user, "P@ssw0rd");
            context.SaveChanges();
        }
}

My ApplicationDbContext类:

public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    public DbSet<Dentist> Dentists { get; set; }
    public DbSet<Patient> Patients { get; set; }
}

我的模型从ApplicationUser扩展，而ApplicationUser又从IdentityUser扩展

ApplicationUser:

public class ApplicationUser : IdentityUser, IModificationHistory
{
    [Required]
    [Display(Name = "First Name")]
    [StringLength(50)]
    public string FirstName { get; set; }
    [Required]
    [Display(Name = "Last Name")]
    [StringLength(50)]
    public string LastName { get; set; }
    [Required]
    [DataType(DataType.Password)] //DataType is very powerfull Data Annotation, which can affect our view if we use EF, so I will try to accomplish as much as possible with that
    [Display(Name = "Password")]
    public string Password { get; set; }

    [DataType(DataType.Date)]
    [DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}", ApplyFormatInEditMode = true)]
    [Display(Name = "Date of birth")]
    public DateTime DateOfBirth { get; set; }
    [Display(Name = "Address")]
    public string Address { get; set; }
    public EmploymentStatus? EmploymentStatus { get; set; } //This value is nullable
    public DateTime DateCreated { get; set; }
    public DateTime? DateModified { get; set; }

    public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser> manager)
    {
        // Note the authenticationType must match the one defined in CookieAuthenticationOptions.AuthenticationType
        var userIdentity = await manager.CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie);
        // Add custom user claims here
        return userIdentity;
    }

}

牙医:

[Table("Dentist")]
public class Dentist : ApplicationUser
{
    public string Place { get; set; }

    //Relations
    public virtual ICollection<Patient> Patients { get; set; }
    public virtual Schedule Schedule { get; set; }
}

病人:

[Table("Patient")]
public class Patient : ApplicationUser
{
    //Relations
    public virtual Dentist Dentist { get; set; }
    public virtual MedicalHistory MedicalHistory { get; set; }
    public virtual ICollection<Appointment> Appointments { get; set; }
}

我想知道，为什么它没有给出任何结果，我应该如何看待我所做的这个关系，或者是否有任何其他更合乎逻辑的关系。