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C# Just want 入门

1. 终于明白为什么以前的程序在结尾部分会经常出现 input any key to exit!

using System;namespace ConsoleApplication1{    class Concat    {        static void Main()        {            Console.WriteLine("Hello,world");            String s1, s2, result;            s1 = Console.ReadLine();            s2 = Console.ReadLine();            result = s1 + s2;            Console.WriteLine("{0} + {1} = {2}",s1,s2,result);            Console.WriteLine("input anykey to exit!");            s2 = Console.ReadLine();        }    }}

 

C# Just want 入门