using System;using System.Collections.Generic;using System.Text;using System.IO; namespace _5_8{    class Program    {        const string base_path = @"E:\c#\c#_net\chuck";        static void Main(string[] args)        {            //如果打算多次重用某个对象，可考虑使用 DirectoryInfo 的实例方法，而不是 Directory 类的相应静态方法，因为并不总是需要安全检查。            //create directory            DirectoryInfo dir = Directory.CreateDirectory(base_path); //按 base_path 的指定创建所有目录和子目录            //create subdirectories            string path = null;            for (int i = 0; i < 10; i++)            {                path=base_path+"\\sub"+i;                DirectoryInfo subdir = dir.CreateSubdirectory("sub"+i);                Directory.SetCurrentDirectory(subdir.FullName);                for (int j = 0; j < i; j++)                {                    subdir.CreateSubdirectory("subsub" + j);                }                Directory.SetCurrentDirectory(path); //将当前工作的目录重新指向path，因为上面创建了子目录，工作目录在子目录中。             }             Console.WriteLine(Directory.GetCurrentDirectory());            createfile();            Directory.Delete(base_path + "\\sub" + 4, true);             //目录的移动，两种方法。上面dir目录的创建也可以用DirectoryInfo的create（）方法。（但是调用之前得创建DirectoryInfo对象，并判断目录是否存在）            //Directory.CreateDirectory(base_path);  好像不会发生 如果base_path存在的异常。                        //Directory.Move(base_path + "\\sub" + 3, base_path + "\\sub" + 4);  //这方法也可以             DirectoryInfo sub3 = new DirectoryInfo(base_path + "\\sub" + 3);            sub3.MoveTo(base_path + "\\sub" + 4);         }        private static void createfile()        {            FileStream fs = new FileStream("test.txt",FileMode.OpenOrCreate,FileAccess.ReadWrite,FileShare.None);            StreamWriter sw = new StreamWriter(fs);            sw.WriteLine("testing");            sw.Flush();            sw.Close();        }    }}

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