C# 类的索引器

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace _18索引器的使用{    class Program    {        static void Main(string[] args)        {            //int[] nums = { 1, 2, 3, 4, 5 };            //Console.WriteLine(nums[2]);            Person p = new Person();            //p.Numbers = new int[] { 1, 2, 3, 4, 5 };            p[0] = 1;            p[1] = 2;            p[2] = 3;            p[3] = 4;            Console.WriteLine(p[0]);            Console.WriteLine(p[1]);            p["张三"] = "一个好人";            p["大黄"] = "汪汪汪";            p["春生"] = "哈哈哈";            Console.ReadKey();        }    }    class Person    {        private int[] numbers = new int[5];        public int[] Numbers        {            get { return numbers; }            set { numbers = value; }        }        //索引器 让对象以索引的方式操作数组        public int this[int index]        {            get { return numbers[index]; }            set { numbers[index] = value; }        }        Dictionary<string, string> dic = new Dictionary<string, string>();        public string this[string index]        {            get { return dic[index]; }            set { dic[index] = value; }        }        Dictionary<int, string> dic2 = new Dictionary<int, string>();          }}