1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 using System.Threading.Tasks; 6 7 using System.Collections; 8 9 namespace day01 10 { 11 12 class Class20 13 { 14 static void Main(string[] args) 15 { 16 ArrayList list = new ArrayList(); 17 18 list.Add(new Person("zhangsan", 103)); 19 list.Add(new Person("lisi", 54)); 20 list.Add(new Person("wangwu", 25)); 21 22 list.Sort(); 23 foreach(Person temp in list) 24 { 25 Console.WriteLine(temp.ToString()); 26 } 27 28 29 30 Console.ReadKey(); 31 } 32 } 33 public class Person : IComparable 34 { 35 public string Name; 36 public int Age; 37 public Person() 38 { 39 40 } 41 public Person(string name,int age) 42 { 43 Name = name; 44 Age = age; 45 } 46 public override string ToString() 47 { 48 return "name: " + Name + " age: " + Age; 49 } 50 public int CompareTo(object obj) 51 { 52 if(obj is Person) 53 { 54 Person person = obj as Person; 55 { 56 return this.Age - person.Age; 57 } 58 } 59 else 60 { 61 throw new ArgumentException("对象转化异常"); 62 } 63 } 64 } 65 66 67 }