Webclient "The operation has timed out" and override webclient with customized timeout

 public class WebDownload : WebClient
    {
        /// <summary>
        /// Time in milliseconds
        /// </summary>
        public int Timeout { get; set; }

        public WebDownload() : this(600000) { }

        public WebDownload(int timeout)
        {
            this.Timeout = timeout;
        }

        protected override WebRequest GetWebRequest(Uri address)
        {
            var request = base.GetWebRequest(address);
            if (request != null)
            {
                request.Timeout = this.Timeout;
            }
            return request;
        }
    }




static void WebDownloadDemo()
        {
            string url = "https://tfetimes.com/wp-content/uploads/2015/09/c-gui-programming-with-qt-4-2ndedition.pdf";
            WebDownload wd = new WebDownload();
            byte[] data = wd.DownloadData(url);
            File.WriteAllBytes("aaaa.pdf", data);
        }