是否要继续输入

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication4
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("输入0即可继续");
               lop:
          
                string d = Console.ReadLine();
                string f = Console.ReadLine();
                int e = int.Parse(d);
                int g = int.Parse(f);
                int sum;
                sum = e + g;
                Console.WriteLine(sum);

                Console.WriteLine("是否要继续?");
                string isGone = Console.ReadLine();

                while ("0" == isGone)
                {
                    Console.WriteLine("请继续输入");
                    goto lop;
                  
                }                                                                              
        }
    }
}