کد دانلود تصویر و ذخیره آن در سی شارپ

/// <summary>
        /// Function to download Image from website
        /// </summary>
        /// <param name="_URL">URL address to download image</param>
        /// <returns>Image</returns>
        /// SoftAfzar.Net ///
        public Image DownloadImage(string _URL)
        {
            Image _tmpImage = null;

            try
            {
                // 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();
            }
            catch (Exception)
            {
                return null;
            }

            return _tmpImage;
        }

نحوه فراخوانی:

Image _Image = null;
            _Image = DownloadImage("http://softafzar.net/images/softafzar.gif");

            // check for valid image
            if (_Image != null)
            {
                // show image in picturebox
                pictureBox1.Image = _Image;

                // lets save image to disk
                _Image.Save(@"e:softafzar.gif");

موفق باشید :winksmiley02: