I am creating an ASP.Net MVC application related to design, buildings and etc. I need to have two types of users - Normal People and Companies. Here I read how I can do it. I have created basic class ApplicationUser. The classes PersonUser and CompanyUser inherit this class and have some more properties. I am using MSSQL Database. I have thee following questions:

• (My main question) Should I create DbSet<PersonUser> and DbSet<CompanyUser> or I should create DbSet<ApplicationUser>?
• When I create database connections should the foreign key point to PersonUser and CompanyUser or to ApplicationUser?
• In controllers when I user UserManager<TUser> or SignInManager<TUser> depending on the user I need to use different properties. Do I have to have two UserManagers or I should parse like that every time var user = (PersonUser) await this.userManager.GetUserAsync(this.User);?

Here are my classes:

public class ApplicationUser : IdentityUser, IAuditInfo, IDeletableEntity
{
    public ApplicationUser()
    {
        this.Id = Guid.NewGuid().ToString();
        this.Roles = new HashSet<IdentityUserRole<string>>();
        this.Claims = new HashSet<IdentityUserClaim<string>>();
        this.Logins = new HashSet<IdentityUserLogin<string>>();

        this.Notifications = new HashSet<Notification>();
    }

    // Audit info
    public DateTime CreatedOn { get; set; }

    public DateTime? ModifiedOn { get; set; }

    // Deletable entity
    public bool IsDeleted { get; set; }

    public DateTime? DeletedOn { get; set; }

    public virtual ICollection<IdentityUserRole<string>> Roles { get; set; }

    public virtual ICollection<IdentityUserClaim<string>> Claims { get; set; }

    public virtual ICollection<IdentityUserLogin<string>> Logins { get; set; }

    [Required]
    public string Password { get; set; }

    public UserType UserType { get; set; }

    public virtual ICollection<Notification> Notifications { get; set; }
}

public class PersonUser : ApplicationUser
{
    public PersonUser() : base()
    {
        this.Bids = new HashSet<Bid>();
        this.Buildings = new HashSet<Building>();
    }

    [Required]
    public string FirstName { get; set; }

    [Required]
    public string LastName { get; set; }

    public DesignerType DesignerType { get; set; }

    public virtual ICollection<Bid> Bids { get; set; }

    public virtual ICollection<Building> Buildings { get; set; }
}

public class CompanyUser : ApplicationUser
{
    public CompanyUser() : base()
    {
    }

    [Required]
    public string CompanyName { get; set; }

    // That is like Id of the company
    [Required]
    public string Bulstat { get; set; }
}