//Define field description information, field length, and basic validation rules
    public partial class Order:Entity
    {
        public Order() {
            OrderDetails = new HashSet<OrderDetail>();
        }
        [Key]
        public int Id { get; set; }
        [Required] //提示必填,用红色标注
        [Display(Name = "订单号", Description = "订单号", Order = 1)]
        [MaxLength(12)] //输入长度验证
        [MinLength(12)] //输入长度验证
        [Index(IsUnique =true)]
        public string OrderNo { get; set; }
        [Required] //提示必填
        [Display(Name ="客户名称",Description ="订单所属的客户",Order =1)]
        [MaxLength(30)]
        public string Customer { get; set; }
        [Required]
        [Display(Name = "发货地址", Description = "发货地址", Order = 2)]
        [MaxLength(200)]
        public string ShippingAddress { get; set; }
        [Display(Name = "订单日期", Description = "订单日期默认当天", Order = 3)]
        [DefaultValue("now")] //初始化创建对象时设定默认值
        public DateTime OrderDate { get; set; }
        //关联订单明细 1-*
        public virtual ICollection<OrderDetail> OrderDetails { get; set; }
    }
    public partial class OrderDetail:Entity
    {
        [Key]
        public int Id { get; set; }
        ...
    }

Controllers\OrdersController.cs  /* MVC controller */
Repositories\Orders\OrderQuery.cs  /* Define business logic related queries such as paging selection, foreign key/primary key queries */
Repositories\Orders\OrderRepository.cs /* Repository Design patterns */
Services\Orders\IOrderService.cs /*  business logic interfaces  */
Services\Orders\OrderService.cs /*  business logic implementation  */
Views\Orders\Index.cshtml /* The order information DataGrid includes functions such as query/add/delete/modify/import/export */
Views\Orders\_PopupDetailFormView.cshtml /* Order information pops up in an edit window  */

        /// <summary>Registers the type mappings with the Unity container.</summary>
        /// <param name="container">The unity container to configure.</param>
        /// <remarks>There is no need to register concrete types such as controllers or API controllers (unless you want to 
        /// change the defaults), as Unity allows resolving a concrete type even if it was not previously registered.</remarks>
        public static void RegisterTypes(IUnityContainer container)
        {
              container.RegisterType<IRepositoryAsync<Order>, Repository<Order>>();
              container.RegisterType<IOrderService, OrderService>();
              container.RegisterType<IRepositoryAsync<OrderDetail>, Repository<OrderDetail>>();
              container.RegisterType<IOrderDetailService, OrderDetailService>();
        }