C#------IO练习

 class Program
    {
        //练习一：将1.txt的文件字节与2.txt文件文件字节合并为一个文件3.txt。
        static void Main(string[] args)
        {
           using( Stream fs1 = File.OpenRead(@"C:\Users\Administrator\Desktop\C#OOP练习\1.txt") )
           using(Stream fs2 = File.OpenRead(@"C:\Users\Administrator\Desktop\C#OOP练习\2.txt") )
           using (Stream OutStream = File.OpenWrite(@"C:\Users\Administrator\Desktop\C#OOP练习\3.txt"))
           {
               fs1.CopyTo(OutStream);
               fs2.CopyTo(OutStream);
           }
           
        }
    }