// Open a connection
                System.Net.HttpWebRequest _HttpWebRequest = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(_URL);
                _HttpWebRequest.AllowWriteStreamBuffering = true;
                // You can also specify additional header values like the user agent or the referer: (Optional)
                _HttpWebRequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)";
                _HttpWebRequest.Referer = "http://www.google.com/";
                // set timeout for 20 seconds (Optional)
                _HttpWebRequest.Timeout = 20000;
                // Request response:
                System.Net.WebResponse _WebResponse = _HttpWebRequest.GetResponse();
                // Open data stream:
                System.IO.Stream _WebStream = _WebResponse.GetResponseStream();
                // convert webstream to image
                _tmpImage = Image.FromStream(_WebStream);
                // Cleanup
                _WebResponse.Close();
                _WebResponse.Close();