DirectoryInfo dir1 = new DirectoryInfo(".");  //绑定当前的应用程序目录
            DirectoryInfo dir2 = new DirectoryInfo(@"D:\360Downloads");//使用存在的目录
            //如果试图使用一个不存在的目录．系统会引发System.IO.DirectoryNOtFoundExceptlon 异常。因此，如果指定了一个尚未创建的目录的话，在对目录进行操作前首先需要调用Create()方法。
            DirectoryInfo dir3 = new DirectoryInfo(@"D:\360Downloads\dir2");
            dir3.Create();
            Console.WriteLine("DirectoryInfo 主要成员的实现");
            Console.WriteLine("FullName:{0}", dir3.FullName);
            Console.WriteLine("Name:{0}", dir3.Name);
            Console.WriteLine("Parent:{0}", dir3.Parent);
            Console.WriteLine("CreationTime:{0}", dir3.CreationTime);
            Console.WriteLine("Attributes:{0}", dir3.Attributes);
            Console.WriteLine("Root:{0}", dir3.Root);

  DirectoryInfo dir = new DirectoryInfo(@"C:\Users\Public\Pictures");
            FileInfo[] imageFiles = dir.GetFiles("*.jpg", SearchOption.AllDirectories);
            foreach (FileInfo f in imageFiles)
            {
                Console.WriteLine("********************");
                Console.WriteLine("file Name:{0}", f.Name);
                Console.WriteLine("file Length:{0}", f.Length);
                Console.WriteLine("file CreationTime:{0}", f.CreationTime);
                Console.WriteLine("file Attributes:{0}", f.Attributes);
                Console.WriteLine("********************");
            }

 DirectoryInfo dir = new DirectoryInfo(@"D:\360Downloads\dir2");
            dir.CreateSubdirectory("MyFolder");
            //尽骨不一定要去捕获 CreateSubdirectory()方法的返回值，但是需要知道的是．如果执行成功．它会返回DirectoryInfo类型
            DirectoryInfo dir1=dir.CreateSubdirectory(@"MyFolser2\Data");
            Console.WriteLine("New Foloser:{0}",dir1);

            string[] dives = Directory.GetLogicalDrives();
            Console.WriteLine("Here are your drives:");
            foreach (string s in dives)
            {
                Console.WriteLine("------->{0}", s);
            }

            try
            {
                Directory.Delete(@"D:\360Downloads\dir2\MyFolser2\Data");
            }
            catch (IOException e)
            {

                Console.WriteLine(e.Message);
            }

           DriveInfo[] myDivers = DriveInfo.GetDrives();
            foreach (DriveInfo d in myDivers)
            {
                Console.WriteLine("Name:{0}", d.Name);
                Console.WriteLine("Type:{0}", d.DriveType);
                //检查驱动器是否已经安装好
                if (d.IsReady)
                {
                    Console.WriteLine("Free space:{0}", d.TotalFreeSpace);
                    Console.WriteLine("Format space:{0}", d.DriveFormat);
                    Console.WriteLine("Lable space:{0}", d.VolumeLabel);
                }
                Console.WriteLine("***************************");
            }

FileInfo f1 = new FileInfo(@"D:\360Downloads\dir2\Test2.txt");
using (FileStream f2=f1.Create())
{

}

            FileInfo f = new FileInfo(@"D:\360Downloads\dir2\Test3.txt");
            using (FileStream fs = f.Open(FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.None))
            {

            }

           FileInfo f = new FileInfo(@"D:\360Downloads\dir2\test.txt");
            using (FileStream fs = f.OpenRead())
            {
                Console.WriteLine("ok");
            }

            FileInfo f4 = new FileInfo(@"D:\360Downloads\dir2\test4.txt");
            using (FileStream fs1 = f4.OpenWrite())
            {

            }

            FileInfo f = new FileInfo(@"D:\360Downloads\dir2\Test3.txt");
            using (StreamReader reader = f.OpenText())
            {

            }

            FileInfo f = new FileInfo(@"D:\360Downloads\dir2\Test6.txt");
            using (StreamWriter sr = f.CreateText())
            {

            }

            FileInfo f1 = new FileInfo(@"D:\360Downloads\dir2\aa.txt");
            using (StreamWriter sr = f1.AppendText())
            {

            }

            using (FileStream fs = File.Create(@"D:\360Downloads\dir2\bb.txt"))
            {

            }

            using (FileStream fs = File.Open(@"D:\360Downloads\dir2\bb.txt", FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.None))
            {

            }

            using (FileStream fs = File.OpenRead(@"D:\360Downloads\dir2\bb.txt"))
            {

            }

            using (FileStream fs = File.OpenWrite(@"D:\360Downloads\dir2\bb.txt"))
            {

            }

            using (StreamReader sr = File.OpenText(@"D:\360Downloads\dir2\bb.txt"))
            {

            }

            using (StreamWriter sw = File.CreateText(@"D:\360Downloads\dir2\bb.txt"))
            {

            }

            using (StreamWriter sw = File.AppendText(@"D:\360Downloads\dir2\bb.txt"))
            {

            }

           Console.WriteLine("批量读写数据");
            string[] myTasks = { "蒸甜糕", "做糖饼", "腌桂花蜜", "做桂花酿" };
            //写入文件
            File.WriteAllLines(@"D:\360Downloads\dir2\bb.txt", myTasks);
            //重新读取然后输出
            foreach (string item in File.ReadAllLines(@"D:\360Downloads\dir2\bb.txt"))
            {
                Console.WriteLine(item);
            }

            Console.WriteLine("***FileStream***");
            //获取一个FileStream对象
            using (FileStream fs = File.Open(@"D:\360Downloads\dir2\cc.txt", FileMode.OpenOrCreate))
            {
                string msg = "Hello";
                //把字符串编码成字节数组
                byte[] msgAsByteArray = Encoding.Default.GetBytes(msg);
                //写入文件
                fs.Write(msgAsByteArray, 0, msgAsByteArray.Length);
                //重置流的内部位置
                fs.Position = 0;

                //从文件读取字节并显示在控制台
                Console.WriteLine("**Your Message**");
                byte[] bytesFromFile = new byte[msgAsByteArray.Length];
                for (int i = 0; i < msgAsByteArray.Length; i++)
                {
                    bytesFromFile[i] = (byte)fs.ReadByte();
                    Console.WriteLine(bytesFromFile[i]);
                }
                //解码后字符串
                Console.WriteLine("Decoded Messges:");
                Console.WriteLine(Encoding.Default.GetString(bytesFromFile));
            }

            Console.WriteLine("****Fun with StreamWriter*****");
            using (StreamWriter writer = File.CreateText(@"D:\360Downloads\dir2\re.txt"))
            {
                writer.WriteLine("鱼是做给大家伙儿吃的，乔初熏发觉这些人都挺爱吃甜口吃食，便打算做个糖醋鲤");
                writer.WriteLine("鱼是做给大家伙儿吃的，乔初熏发觉这些人都挺爱吃甜口吃食，便打算做个糖醋鲤");
                writer.WriteLine("鱼是做给大家伙儿吃的，乔初熏发觉这些人都挺爱吃甜口吃食，便打算做个糖醋鲤");
                for (int i = 0; i < 10; i++)
                {
                    writer.Write(i + " ");
                }
            }
            Console.WriteLine("Created file");

            Console.WriteLine("***Fun with StreamReader***");
            using (StreamReader sr = File.OpenText(@"D:\360Downloads\dir2\re.txt"))
            {
                string inpt = null;
                while ((inpt=sr.ReadLine())!=null)
                {
                    Console.WriteLine(inpt);
                }
            }

            Console.WriteLine("直接创建streamwriter/streamreader类型");
            using (StreamWriter sw = File.CreateText(@"D:\360Downloads\dir2\chuchu.txt"))
            {
                string mag = " 不一会儿，大锅里的水烧的滚沸，乔初熏把手洗干净，伸手捏了些羊肉，攒成丸子便往锅里一丢，小桃儿在旁边看着直咋舌：“初熏姐姐，这样会不会太松了。”她见乔初熏手上也不怎么使劲儿，生怕羊肉丸子一进锅便散了。";
                sw.WriteLine(mag);
                Console.WriteLine("ok");
            }
            using (StreamReader sr = File.OpenText(@"D:\360Downloads\dir2\chuchu.txt"))
            {
                string input = null;
                while ((input = sr.ReadLine()) != null)
                {
                    Console.WriteLine(input);
                }
            }

            Console.WriteLine("Fun StringWriter");
            using (StringWriter sw = new StringWriter())
            {
                sw.WriteLine("乔初熏手上动作不停，一边笑着解释道：“不会。手劲儿太大了反而不好。汆出来的丸子容易发死，吃起来不够鲜嫩.");
                Console.WriteLine(sw);
            }

            Console.WriteLine("GetStringBuilder");
            using (StringWriter sw = new StringWriter())
            {
                sw.WriteLine("很快，一边蒸锅里的鱼也差不多到火候了。乔初熏拿着勺子搅了搅汤，让小桃儿把鱼端出来。");
                Console.WriteLine(sw);

                StringBuilder sb = sw.GetStringBuilder();
                sb.Insert(0, "Hey");
                Console.WriteLine(sb.ToString());
                sb.Remove(0, "Hey".Length);
                Console.WriteLine(sb.ToString());
            }

            Console.WriteLine("*****Fun with Writer 和Reader******");
            FileInfo f = new FileInfo(@"D:\360Downloads\dir2\aa.txt");
            using (BinaryWriter bw = new BinaryWriter(f.OpenWrite()))
            {
                Console.WriteLine(bw.BaseStream);
                double a = 1234.67;
                int i = 3452;
                string str = "Hello";
                bw.Write(a);
                bw.Write(i);
                bw.Write(str);
            }
            Console.WriteLine("Done!");

            using (BinaryReader br = new BinaryReader(f.OpenRead()))
            {
                Console.WriteLine(br.ReadDouble());
                Console.WriteLine(br.ReadInt32());
                Console.WriteLine(br.ReadString());
            }

 Console.WriteLine("****FileSystemWatcher****");
            FileSystemWatcher watcher = new FileSystemWatcher();
            try
            {
                watcher.Path = @"D:\360Downloads\dir2";
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
            watcher.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite | NotifyFilters.FileName | NotifyFilters.DirectoryName;
            watcher.Filter = "*.txt";
            watcher.Changed += new FileSystemEventHandler(OnChanged);
            watcher.Created += new FileSystemEventHandler(OnChanged);
            watcher.Deleted += new FileSystemEventHandler(OnChanged);
            watcher.Renamed += new RenamedEventHandler(OnRenamed);
            watcher.EnableRaisingEvents = true;
            Console.WriteLine("Press q");
            while (Console.ReadLine() != "q")

        static void OnChanged(object source, FileSystemEventArgs e)
        {
            Console.WriteLine("File:{0}{1}", e.FullPath, e.ChangeType);
        }

        static void OnRenamed(object source, FileSystemEventArgs e)
        {
            Console.WriteLine("File:{0},OnRenamed:{1}", e.FullPath, e.ChangeType);
        }