C# 索引器和运算符的重载

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace ConsoleApplication2{    class Program    {        class Array        {            public int[] p;            public int this[int i]            {                get                {                    return p[i];                }                set                {                    p[i] = value;                }            }            public Array()            {                p = new int[2];            }        }        static void Main(string[] args)        {            Array a = new Array();            a[0] = 1;            a[1] = 2;        }    }}