代码参考:

using System;namespace FoodRobotDemo
{  public class FoodRobot{private int[] foodCountArr;private string[] foodNameArr;public FoodRobot(){foodCountArr = new int[3];foodNameArr = new string[3] {"航天","航空","宇航" };}public int this[string name]{get{int i = Array.IndexOf(foodNameArr, name);if (i != -1 && i >= 0 && i < 3)return foodCountArr[i];else{Console.WriteLine("读取操作有误,找不到{0}食品",name);return -1;}}set{int i = Array.IndexOf(foodNameArr, name);if (i != -1)foodCountArr[i] = value;elseConsole.WriteLine("赋值操作有误,找不到{0}食品", name);}}      }class Program{static void Main(string[] args){//多参数索引器和索引器重载          FoodRobot foodRobot = new FoodRobot();foodRobot["航天"] = 11;foodRobot["航空"] = 22;foodRobot["宇航"] = 33;foodRobot["行行"] = 44;Console.WriteLine(foodRobot["航天"]);Console.WriteLine(foodRobot["天天"]);Console.ReadKey();}}
}