System.IO 二

  static void Main(string[] args)
        {
            Console.WriteLine("请开始你的表演：");
            FileSystemWatcher watcher = new FileSystemWatcher();
            watcher.Path = @"E:\Test";  //此目录一定需要存在，不然会引发 ArgumentException 异常
            //设置需要 留意 的事情
            watcher.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite | NotifyFilters.FileName | NotifyFilters.DirectoryName;
            //只观察文本文件
            watcher.Filter = "*.txt"; 
            //添加事件处理程序
            watcher.Changed += new FileSystemEventHandler(Onchange);
            watcher.Created += new FileSystemEventHandler(Onchange);
            watcher.Deleted += new FileSystemEventHandler(Onchange);
            watcher.Renamed += new RenamedEventHandler(OnRenamed);
            //开始观察目录
            watcher.EnableRaisingEvents = true;
            //等待用户退出程序
            Console.WriteLine("请按 `q` 退出程序");
            while (Console.Read() !=‘q‘);          
        }
        static void Onchange(object source, FileSystemEventArgs e) 
        {
            //指定当文件改变、创建或者删除的时候需要做的事情
            Console.WriteLine("File:{0} {1}",e.FullPath,e.ChangeType);
        }
        static void OnRenamed(object source, RenamedEventArgs e) 
        {
            //指定当文件重命名的时候需要做的事情
            Console.WriteLine("File: {0} renamed to {1}",e.OldFullPath,e.FullPath);
        }