using (WebClient wc = new WebClient())
            {
                wc.Headers.Add("user-agent", "Mozilla/5.0 (Windows; Windows NT 5.1; rv:1.9.2.4) Gecko/20100611 Firefox/3.6.4");
                string html = wc.DownloadString("https://www.dividends.sg/view/D05");
                HtmlDocument doc = new HtmlDocument();
                doc.LoadHtml(html);
            }
error is below
$exception  {System.Net.WebException: Error: SecureChannelFailure (The authentication or decryption has failed.) …} System.Net.WebException
i tried using bs4 and it worked when i add useragent but i have switch to c# currently and i have no idea if this is a correct way to do so.
