ASP.NET通过URL将图片下载到电脑本地文件夹

HttpWebRequest webrequest = (HttpWebRequest)WebRequest.Create("http://www.baidu.com/sdf/sdf.jpg");
    HttpWebResponse webresponse = (HttpWebResponse)webrequest.GetResponse();
     if (webresponse.StatusCode == HttpStatusCode.OK)
     {
     System.Drawing.Image image = System.Drawing.Image.FromStream(webresponse.GetResponseStream());
     image.Save(@"E:xx.jpg"); //保存在本地文件夹
     image.Dispose(); //释放资源
    }