1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Threading.Tasks;
 6 
 7 namespace JD.entity
 8 {
 9     /// <summary>
10     /// 动物类
11     /// </summary>
12     public class Animals
13     {
14         /// <summary>
15         /// 名字
16         /// </summary>
17         public string Name { get; set; }
18         /// <summary>
19         /// 颜色
20         /// </summary>
21         public string Color { get; set; }
22         public Animals(string name,string color)
23         {
24             this.Name = name;
25             this.Color = color;
26         }
27     }
28 }

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Threading.Tasks;
 6 
 7 namespace JD.entity
 8 {
 9     /// <summary>
10     /// 猫类
11     /// </summary>
12    public class Cat:Animals
13     {
14        public Cat(string name ,string color):base(name,color)
15        {
16            
17        }
18        public void Bark()
19        {
20            Console.WriteLine("是{0}猫{1},喵喵",base.Color,base.Name);
21        }
22     }
23 }

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Threading.Tasks;
 6 
 7 namespace JD.entity
 8 {
 9     /// <summary>
10     /// 狗类
11     /// </summary>
12     public class Dog:Animals
13     {
14         public Dog(string name ,string color):base(name,color)
15        {
16            
17        }
18         public void Bark()
19         {
20             Console.WriteLine("是{0}狗{1},旺旺", base.Color, base.Name);
21         }
22     }
23 }

 1 using JD.entity;
 2 using System;
 3 using System.Collections.Generic;
 4 using System.Linq;
 5 using System.Text;
 6 using System.Threading.Tasks;
 7 
 8 namespace JD
 9 {
10     class Program
11     {
12         static void Main(string[] args)
13         {
14             //动物
15             List<Animals> listAnimals = new List<Animals>();
16 
17             //添加Cat
18             listAnimals.Add(new Cat("加菲","红色"));
19             listAnimals.Add(new Cat("变色","黄色"));
20 
21             //添加Dog
22             Dog d = new Dog("泰迪","黑色");
23             Dog d1 = new Dog("大黄","黄色");
24             listAnimals.Add(d);
25             listAnimals.Add(d1);
26             //遍历
27             foreach (var item in listAnimals)
28             {
29                 //判断
30                 if (item is Dog)
31                 {
32                     ((Dog)item).Bark();
33                 }
34                 if (item is Cat)
35                 {
36                     ((Cat)item).Bark();
37                 }
38             }
39         }
40     }
41 }