索引器

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            var myindex = new MyIndex();
            myindex[0] = "0";
            myindex[1] = "1";
            myindex[2] = "2";
            myindex[3] = "3";
            myindex[4] = "4";
            myindex[5] = "5";
            myindex[6] = "6";
            myindex[7] = "7";
            myindex[8] = "8";
            myindex[9] = "9";
            for (int i = 0; i < 10; i++)
            {
                Console.WriteLine(myindex[i]);
            }
            Console.ReadLine();
        }
    }
    class MyIndex
    {
        private string[] MyString = new string[10];
        public MyIndex()
        {
            for (int i = 0; i < MyString.Length; i++)
            {
                MyString[i] = "N/A";
            }
        }
        public string this[int index]
        {
            get
            {
                string tmp;
                if (index >= 0 && index < MyString.Length)
                    tmp = MyString[index];
                else
                    tmp = "";
                return tmp;
            }
            set
            {
                if (index >= 0 && index < MyString.Length)
                {
                    MyString[index] = value;
                }
            }
        }
    }
}