用于在第二次调用时终止数组内的循环

我用C#做过编码，但在控制台应用程序中做得不多（老师让我们在里面做作业）

我遇到了一个问题，我的静态方法第一次被调用时工作良好（每个问题都被问到），但第二次通过控制台关闭。我需要这个函数执行10次，但不知道为什么它不会。以下是我所拥有的，并提前表示感谢！：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Lab2
{
    class Program
    {
        //Create the arrays
        static string[] questions = new string[5];  //For questions
        static int[] tableHeader = new int[10];      //Table Header
        static int[,] responses = new int[5, 10];   //For answers
        //Int for the number of times the questions have been asked
        static int quizCount = 0;
        static int answer;
        static bool isGoing = true;
        static void Main(string[] args)
        {
            //Set the questions in an array
            questions[0] = "On a scale of 1-10, how do you feel about the drinking age in Wisconsin?";
            questions[1] = "On a scale of 1-10, how often do you drink a week?";
            questions[2] = "On a scale of 1-10, how important is this class?";
            questions[3] = "On a scale of 1-10, how would you rate this campus?";
            questions[4] = "On a scale of 1-10, how would you rate this command prompt?";
            while(isGoing)
                Questions();
        }
        static void Questions()
        {
            for (int i = 0; i < 5; i++)
            {
                Console.WriteLine(questions[i]);
                answer = Convert.ToInt16(Console.ReadLine());
                responses[i, quizCount] = answer;
            }
            if (quizCount < 10)
            {
                Console.WriteLine("Enter more data? (1=yes, 0=no)");
                int again = Console.Read();
                if (again != 1)
                    Environment.Exit(0);
            }
            else
                isGoing = false;
                DisplayResults();
        }
        static void DisplayResults()
        {
            Console.WriteLine(tableHeader);
            for (int i = 0; i < 5; i++)
            {
                for (int x = 0; x < 10; x++)
                {
                    Console.Write(responses[i, x]);
                }
                Console.Write("'n");
            }
        }
    }
}