C#采用FileSystemWatcher实现监视磁盘文件变更的方法

            foreach (FileSystemWatcher w in watchers)
            {
                if (w == null) continue;

                w.Filter = "*";
                w.IncludeSubdirectories = true;
                w.EnableRaisingEvents = true;

                w.Created += onFileSystem_Changed;
                w.Deleted += onFileSystem_Changed;
                w.Changed += onFileSystem_Changed;
                w.Renamed += watcher_Renamed;
            }

            Console.ReadLine();
        }

        #region [ 检测文件是否占用 ]
        /// <summary>
        /// 检测文件是否占用
        /// </summary>
        /// <param name="filename"></param>
        /// <returns></returns>
        static bool IsFileReady(string filename)
        {
            var fi = new FileInfo(filename);
            FileStream fs = null;
            try
            {
                fs = fi.Open(FileMode.Open, FileAccess.Read, FileShare.None);
                return true;
            }