muri = @"https://secure.website....&AuditID=" + @mauditid; filePath = mfolderpath + fileName + "_WebPDF_" + DateTime.Now.ToString("yyyyMMddHHmmss") + "_" + mloop.ToString() + ".PDF"; WebClient c = new WebClient(); var credCache = new CredentialCache(); credCache.Add(new Uri(muri), "NTLM", new NetworkCredential("username", "password")); var request = (HttpWebRequest)WebRequest.Create(muri); c.UseDefaultCredentials = true; c.Credentials = credCache; c.DownloadFile(new Uri(muri), filePath);~M