[sbonakalisos4]

 public string readHtmlPage(string url)
        {
            WebResponse objResponse = default(WebResponse);
            WebRequest objRequest = default(WebRequest);
            string result = null;
            try
            {
                objRequest = System.Net.HttpWebRequest.Create(url);
                objResponse = objRequest.GetResponse();
                StreamReader sr = new StreamReader(objResponse.GetResponseStream());
                result = sr.ReadToEnd();
                //clean up StreamReader
                sr.Close();
                return result;
            }
            catch (Exception ex)
            {
                
                string s = ex.ToString();
                if (Convert.ToBoolean( Microsoft.VisualBasic.Strings.InStr(s,"(404)"))) --This is where i get the error.
                {
                    return "URL: " + url + " not found.";
                }
                else
                {
                   return s;
                }
            }

[JackOfAllTrades]

Quote

if (Convert.ToBoolean( Microsoft.VisualBasic.Strings.InStr(s,"(404)"))) --This is where i get the error.

WHAT ERROR???? Why the heck are you using VisualBasic code in C# ANYWAY?

[Nakor]

yeah, there's very few cases where you'd need to use a call to visual basic inside C#, and this is definitely not one of them from what I can see. You should just be able to use string.Contains if you're wanting to check if the message contains some specific text.