自定义方法addmoney，模拟手机充值的过程，在方法中输入“充值卡卡号#充值卡密码#充值的手机号码”字符串，从中取出要充值的手机号码，向用户确认是否要充值，输入1确定，输入其他任意键放弃，方法返回的充值是否成功，在Main（）方法中输出结果。

小弟的代码：
static void Main(string[] args)
        {
            int position;
            string shoujihao;
            string getshouji;
            Console.WriteLine("请输入充值卡卡号#充值卡密码#充值的手机号");
            shoujihao = Console.ReadLine();
            position = shoujihao.IndexOf("#");
            getshouji = shoujihao.Substring(position, shoujihao.Length - position);

            getshouji = addmoney(shoujihao);
            
            Console.WriteLine(getshouji);
            Console.ReadLine();
        }
        private static string addmoney(string shoujihao)
        {
            
            string getshouji;
            if (getshouji equals (shoujihao)
            {
                Console.WriteLine("确认请输入1");
            }
            else
            {
             Console.WriteLine("确认请输入2");
            }
          return shoujihao;

谢谢大家帮帮了！

辛苦了 谢谢解答的那么详细！！