https://blog.youkuaiyun.com/fanyinglongzh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/fanyinglong/article/details/6027456https://blog.youkuaiyun.com/fanyinglong/article/details/6027456fanyinglongMon, 22 Nov 2010 16:39:00 +0800 public bool Download(string URL, string Dir)
        {
            WebClient client = new WebClient();
            string fileName = URL.Substring(URL.LastIndexOf("/") + 1);  //被下载的文件名
            string Path = Dir+fileName;   //]]>