public partial class City
    {
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
        public City()
        {
            this.Projects = new HashSet<Project>();
        }

        public int Id { get; set; }
        public string Name { get; set; }
        [ForeignKey("Region")]
        public Nullable<int> Region_Id { get; set; }

        public virtual Region Region { get; set; }
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
        public virtual ICollection<Project> Projects { get; set; }
    }