1     public class Bike
 2     {
 3         /// <summary>
 4         /// 耐久度
 5         /// </summary>
 6         public int Durability { get; set; }
 7 
 8         /// <summary>
 9         /// 使用次数
10         /// </summary>
11         public int NumBer { get; set; }
12 
13         /// <summary>
14         /// 被使用方法
15         /// </summary>
16         public Bike Use(Bike bike)
17         {
18             Random ran = new Random();
19             int RandKey = ran.Next();
20             bike.Durability = bike.Durability - RandKey;
21             bike.NumBer++;
22             return bike;
23         }
24     }
25 
26     public class Person
27     {
28         public Bike Bike { get; set; }
29         
30         /// <summary>
31         /// 骑车
32         /// </summary>
33         /// <param name="bike"></param>
34         public void Ride(Bike bike)
35         {
36             if(bike.NumBer<=0||bike==null)
37             {
38                 Console.WriteLine("条件不足无法骑行");
39             }
40             else if (bike != null)
41             {
42                 Console.WriteLine("开始骑行");
43             }
44         }
45     }