观察下列代码，找出错误的行，并修改正确的选项是（） ArrayList list = new ArrayList() { }; Customer teng = new Customer(" 马腾 ", 32, " 汕头市 "); Customer yun = new Customer(" 王云 ", 28, " 杭州市 "); Customer si= new Customer(" 李军 ", 25, " 仙桃市 "); list.Add(teng); list.Add(yun); list.Add(si); Console.WriteLine(" 排队等待的客户有："); for (int i = 0; i < list.Length; i++) {-----(1) Console.WriteLine("{0} 号：{1}", i+1, (list[i] as Customer).Name); }