学C#第一个控制台程序，怎么一闪就退出了，看不到结果？

Question

using System;
using System.Collections.Generic;
using System.Text;namespace Addition
{
    class Program
    {
        static void Main(string[] args)
        {
            string FirstNumber,
                   SecondNumber;
            int number1,
                number2,
                sum;
            Console.Write("Please enter the first integer:");
            FirstNumber = Console.ReadLine();            Console.Write("Please enter the second integer:");
            SecondNumber = Console.ReadLine();
            number1 = Int32.Parse(FirstNumber);
            number2 = Int32.Parse(SecondNumber);            sum = number1 + number2;
            Console.WriteLine("\n the sum is {0}.",sum);
        }
    }
}我运行程序，提示输入，输完二个数（假设50，70），就一闪而过退出了，根本看不到结果。按照书上的提示，应该有下面的提示：the sum is 120.
为什么我看不到？请教！

Answer 1

最后面在加个
Console.ReadLine();

Answer 2

控制台程序，就是在控制台下面执行的。如果想停顿，就 在后面加Console.Read();

Answer 3

using System;
using System.Collections.Generic;
using System.Text;namespace Addition
{
    class Program
    {
        static void Main(string[] args)
        {
            string FirstNumber,
                   SecondNumber;
            int number1,
                number2,
                sum;
            Console.Write("Please enter the first integer:");
            FirstNumber = Console.ReadLine();            Console.Write("Please enter the second integer:");
            SecondNumber = Console.ReadLine();
            number1 = Int32.Parse(FirstNumber);
            number2 = Int32.Parse(SecondNumber);            sum = number1 + number2;
            Console.WriteLine("\n the sum is {0}.",sum);
Console.ReadLine();
        }
    }
}

Answer 4

年轻人，有前途，记得我第一个控制台程序写的是：Console.WriteLine("Hello World!");:)