Entity framework- EF Code First Select foreign key

Model:

public class Address
{
    [Key]
    public long AddressId { get; set; }

    public string Street { get; set; }

    public string Town { get; set; }

    public string State { get; set; }

    public string Country { get; set; }
}
public class User
{
    [Key]
    public long UserId { get; set; }

    public string UserName { get; set; }

    public string Password { get; set; }

    public virtual List<Address> Addresses { get; set; }
}

DBContext:

public class DataModelContext : DbContext
{
        public DbSet<Address> Addresses { get; set; }
        public DbSet<User> Users{ get; set; }
}

Using above code its creating this schema for DB.

Addresses          Users
-----------        -------
AddressId(PK)      UserId(PK)
Street             UserName 
Town               Password 
State  
Country 
User_UserId(FK)

Now i want to access User_UserId from Addresses table, but it not showing any property there. Its giving error "Address does not contain a definition for User_UserId.....

using (var db = new DataModelContext())
{
       db.Addresses.Select(x=>x.User_UserId).ToList();
}