实现 IComparable

 

IComparable<T>通过T，可以实现保证传入的对对象类型是确定的，这样在编译时就可以确定类型了，

如下的注释的那句，现在只能传入Person类型，这样保证类型是安全的，不必过多的进行Convert

using System;
using System.Collections;//注意using Collections
using System.Collections.Generic;
using System.Text;

namespace ZyyLove2008
{
    class Program
    {
        static void Main(string[] args)
        {
            Person personA = new Person("zhang", 20);
            Person personB = new Person("yang", 25);
            int result = personA.CompareTo(personB);
            //int result = personA.CompareTo(new object());//Error    Argument '1': cannot convert from 'object' to 'ZyyLove2008.Person'
            Console.WriteLine(result.ToString());
            Console.Read();
        }
    }

    public class Person : IComparable<Person>
    {
        private string _name;
        public string Name
        {
            get
            {
                return _name;
            }
            set
            {
                _name = value;
            }
        }
        private int _age;
        public int Age
        {
            get
            {
                return _age;
            }
            set
            {
                _age = value;
            }
        }

        public Person(string name, int age)
        {
            this._name = name;
            this._age = age;
        }

        #region IComparable<Person> Members

        public int CompareTo(Person other)
        {
            return this.Age.CompareTo(other.Age);
        }

        #endregion
    }
}