学习索引器

把对象当成数组
using System;
using System.Collections;

#region//索引器：  indexTest.stringList[1]＝indexTest[1]
//class IndexerExample
//{
//    public string[] stringList = new string[10];
//    public string this[int index]
//    {
//        get { return stringList[index]; }
//        set { stringList[index] = value.ToString(); }
//    }
//}
//class Test
//{
//    static void Main()
//    {
//        IndexerExample indexTest = new IndexerExample();
//        indexTest.stringList[1] = "hello";//直接引用数组
//        indexTest[2] = "beijing";//利用索引，隐式调用了set和get方法

//        Console.WriteLine("{0}--{1}",indexTest[1],indexTest[2]);
//    }
//}
#endregion

#region //非整数下标

class IndexerExample
{
    public Hashtable list = new Hashtable();
    public int this[string name]
    {
        get { return (int) list[name]; }
        set { list[name] = value; }
    }
}

class Test
{
    public static void Main()
    {
        IndexerExample indexTest = new IndexerExample();
        indexTest["fan"] = 12346;
        indexTest["wen"] = 1569;
        Console.WriteLine("fan--{0}",indexTest["fan"]);
    }
}
#endregion