error - Data at the root level is invalid. Line 1, position 1

Question

User647458646 posted

I am currently experiencing error on the following code - i am not sure what's causing this error.  Please advice.  Many thanks. 

error - Data at the root level is invalid. Line 1, position 1

code line - var document = XDocument.Parse(articleABS());

       public string createURL()
        {
            string uri = "";
            
            var document = XDocument.Parse(articleABS());
            var href = document.Descendants("link").Single().Attribute("title").Value;
            href = href.Replace("Article", "");
            string id = Regex.Match(href, @"\d+").Value;
            var result = (@"#####");
            return uri = result.ToString();
        }

 public static string articleABS()
        {
            string URL = "#####";
            string method = "POST";
            string postData = template.createXMLArticle();
            string responseData = "";
            int statusCode;

            if (hwrequest.Method == "POST")
            {
               ....
            }
            
            using (HttpWebResponse hwresponse = (HttpWebResponse)hwrequest.GetResponse())
            {
                ....
                }

                hwresponse.Close();
            }
            return responseData;
        }

Thank you