City.cs

namespace CascadeDelete.Models
{
    public class City
    {
        public City()
        {
            Owners = new List<ResidentCityOwn>();
            Residents = new List<Resident>();
        }
        public int Id { get; set; }

        [Required]
        [StringLength(40)]
        public string Name { get; set; }

        // navigations
        public virtual ICollection<ResidentCityOwn> Owners { get; set; }
        public virtual ICollection<Resident> Residents { get; set; }
    }
}