C#编程-99：索引器实例QQ状态

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace QQState
{
    class QQState
    {
        private string[] states = { "离线", "在线", "隐身", "Q我" };
        private int GetState(string mystate)
        {
            int i = 0;
            foreach (string state in states)
            {
                if (mystate == state) return i;
                i++;
            }
            return -1;
        }
        public int this[string state]
        {
            get { return GetState(state); }
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            QQState qqstate=new QQState();
            Console.WriteLine(qqstate["离线"]);
            Console.WriteLine(qqstate["断线"]);
            Console.WriteLine(qqstate["在线"]);
            Console.ReadKey();
        }
    }
}