///   <summary>

        ///  HttpWebRequest Property

        ///   </summary>

        ///   <param name="fileName">文件名称</param>

        ///   <param name="url">图片地址</param>

        ///   <param name="localPath">本地路径("D:\\imgdow")</param>

        public static void DownloadOneFileByURL(string fileName, string url, string localPath)

        {

            Stream s = null;

            System.Net.HttpWebRequest request = null;

            System.Net.HttpWebResponse response = null;

            request = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(url);

            request.Timeout = ; // 超时时间

            response = (System.Net.HttpWebResponse)request.GetResponse();

            s = response.GetResponseStream();

            var imgs = Image.FromStream(s);

            imgs.Save(localPath + $"/{fileName}.jpg");

            s.Close();

        }