public string scrapefunction(string url,string search, string regexstring)
        {

        using (WebClient client = new WebClient()) // WebClient class inherits IDisposable
        {
            string allthreadusernames = "";
            string htmlCode = "";

            while (String.IsNullOrEmpty(htmlCode))
            {
                try
                {
                    htmlCode = client.DownloadString(url);
                }
                catch
                {
                }
            }
            string[] htmlarray = htmlCode.Split(new string[] { "\n", "\r\n" }, StringSplitOptions.RemoveEmptyEntries);
            foreach (string line in htmlarray)
            {
                if (line.Contains(search))
                {

                    var regex = new Regex(regexstring);
                    var matches = regex.Matches(line);
                    foreach (var singleuser in matches.Cast<Match>().ToList())
                    {
                        allthreadusernames = allthreadusernames + "\n" + singleuser.Groups[1].Value;


                    }
                }
            }

          return allthreadusernames;


        }