private void DeeperDirectory(string path)        {            FileSystemInfo[] fsi = new DirectoryInfo(path).GetFileSystemInfos();            foreach (FileSystemInfo item in fsi)            {                if (item is DirectoryInfo)                {                    //do somethings                    //目录                    DeeperDirectory(item.FullName);                 }                else                {                    //文件                    //do somethings                }            }        }