c# 删除所有的空文件夹

http://www.amazon.cn/Lvze-sp-%E7%BB%BF%E6%B3%BD%E5%B0%9A%E5%93%81-%E6%97%85%E8%A1%8C%E7%AE%B1-%E6%8B%89%E6%9D%86%E7%AE%B1-%E7%99%BB%E6%9C%BA%E7%AE%B1-%E6%8B%89%E6%9D%86%E5%8C%85%E4%B8%AD%E6%80%A7-%E9%AB%98%E6%A1%A3%E5%95%86%E5%8A%A1%E4%BC%91%E9%97%B2%E5%8C%85-20%E5%AF%B8%E9%9D%99%E9%9F%B3%E4%B8%87%E5%90%91%E8%BD%AE-%E6%8B%89%E6%9D%86%E8%83%8C%E5%8C%85628/dp/B00A1YD0TS/ref=sr_1_9?ie=UTF8&qid=1363954751&sr=8-9
     
    /// <summary>
        /// 删除掉空文件夹
        /// 所有没有子“文件系统”的都将被删除
        /// </summary>
        /// <param name="storagepath"></param>
        public static void KillEmptyDirectory(String storagepath)
        {
            DirectoryInfo dir = new DirectoryInfo(storagepath);
            DirectoryInfo[] subdirs = dir.GetDirectories("*.*", SearchOption.AllDirectories);
            foreach (DirectoryInfo subdir in subdirs)
            {
                FileSystemInfo[] subFiles = subdir.GetFileSystemInfos();
                if (subFiles.Count() == 0)
                {
                    subdir.Delete();
                }
            }
        }