一个实体包含多实体。

定义用户+订单。

1   public class Order { 2       public int RecordId { get; set; } 3       public string RecordName { get; set; } 4       public decimal Price { get; set; } 5    } 6    public class Person 7    { 8       public int RecordId { get; set; } 9       public string Name { get; set; }10       11       //注意此 自动属性 的使用方法12       public IList
     
       OrderList { get; set; }13    }
     

调用：

1 class Program 2    { 3       static void Main(string[] args) 4       { 5          //订单1 6          Order order1 = new Order(); 7          order1.RecordId = 1; 8          order1.RecordName = "语文"; 9          order1.Price = 45.32M;10 11          //订单212          Order order2 = new Order();13          order2.RecordId = 2;14          order2.RecordName = "数学";15          order2.Price = 55.67M;16 17          //订单集合18          List
     
       orderList = new List
      
       ();19          orderList.Add(order1);20          orderList.Add(order2);21 22          //购买订单者：张三23          Person person = new Person();24          person.Name = "张三";25          person.RecordId = 1;26          person.OrderList = orderList;27 28          //打印张三订单的信息29          Console.WriteLine("购买者编号：" + person.RecordId + ";购买者：" + person.Name);30          Console.WriteLine("购买的教程：" + person.OrderList[0].RecordName + ";" + person.OrderList[1].RecordName);31 32          Console.ReadKey();33       }34    }
      
     

打印：