c#创建可比较对象

c#中类实现了IComparabe 接口后可实现对此类集合排序等相关操作

class Program
    {
        public static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");
            Person[] pserons=new Person[3];
            pserons[0]=new Person{};
            pserons[1]=new Person{age=5};
            pserons[2]=new Person{age=2};
            Console.WriteLine(" 排序前  ");
            foreach(var item in pserons)
            {
                Console.WriteLine("compareResult   "+item.age+"  Press any key to continue . . . ");
            }
            Array.Sort(pserons);
            Console.WriteLine(" 排序后  ");
            foreach(var item in pserons)
            {
                Console.WriteLine("compareResult   "+item.age+"  Press any key to continue . . . ");
            }
            Console.ReadKey(true);
        }
    }

    //实现比较接口
    public class Person:IComparable
    {
      public int age=0;
    #region IComparable implementation
      int IComparable.CompareTo(object obj)
    {
          var person=obj as Person;
       if(person!=null)
        {
            if(this.age>person.age)
                return 1;
            if(this.age<person.age)
                return -1;
            return 0;
        }
        else
        {
            throw new NotImplementedException("is not a person");
        }
    }
    #endregion
    }

结果图如下，实现了年龄的排序,还可以实现对多个字段的排序这里不详写了：