今天发现了一个新的排序方法，很简单实用！仅供参考：

可以对任何类型的值进行排序。

using System;
using System.Collections.Generic;
using System.Text;

namespace 按类排序_接口_
{
    class Program
    {
        static void Main(string[] args)
        {
            Student []arr=new Student [5];
            arr[0] = new Student("张三",53);
            arr[1] = new Student("李四", 35);
            arr[2] = new Student("王五", 45);
            arr[3] = new Student("马六", 55);
            arr[4] = new Student("钱七", 53);
            Array.Sort(arr);
            foreach (Student i in arr )
            {
                Console.WriteLine(i); //ToString方法再此处调用
            }
            Console.Read();
        }
    }
    class Student:IComparable
    {
        private string _name;
        private int _age;
        public Student(string name,int age)
        {
            _name = name;
            _age = age;
        }
        public string Name
        {
            get { return _name; }
            set { _name = value; }
        }
        public int Age
        {
            get { return _age; }
            set { _age = value; }
        }
        public int CompareTo(object right)
        {
            if(!(right is Student ))
            {
                throw new ArgumentException("参数必须为Student类型");
            }
            return _(((Student )right )._name );
        }
        /// <summary>
        /// 重载ToString方法
        /// </summary>
        /// <returns></returns>
        public override string ToString()
        {
            return _name;
        }
    }
}

打印效果：

学习。

《C#入门经典》里面有类似的示例

呵呵,这么显示接口还是对字符串的排序,
默认Array.Sort(arr);方法中只接收一个字符串类型的排序
return _(((Student )right )._name );方法中限定只对传来的Student中的_name排序.

我给你们提供一个好玩一点的,

 #region IComparable 成员
        int (object right)
        {
            if (!(right is Student))
            {
                throw new ArgumentException("参数必须为Student类型");
            }
             return ((Student)right)._age<_age?1:-1;
        }
#endregion
((Student)right)._age<_age?1:-1; 对_age的递增排序  若以">"为递减排序.
以便大家对自定义结构排序方便.