C#

public class MyException : Exception
{

    private int _errorCode;
    private string _errorDescription;

    public MyException (int errorCode, string errorMessage)
        : base (errorMessage)
    {
        _errorCode = errorCode;
        _errorDescription = errorMessage;
    }

    // This constructor is needed for serialization.
   protected MyException (SerializationInfo info, StreamingContext context)
   {
        // How to implement here?
   }
}

try
 {
     req = (HttpWebRequest)WebRequest.Create("http://www.domain.com/");
     myWebHeaderCollection = req.Headers;
     myWebHeaderCollection.Set("Accept-Language", "en-us;q=0.5,en;q=0.3");
     myWebHeaderCollection.Set("Accept-Encoding", "gzip,deflate");
     myWebHeaderCollection.Set("Accept-Charset", "ISO-8859-1,utf-8;q=0.7,*;q=0.7");
     req.KeepAlive = true;
     req.ServicePoint.Expect100Continue = false;
     req.Referer = "";
     req.UserAgent = "Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0)";
     req.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
     req.Method = "GET";
     req.CookieContainer = cookieContainer;
     response = (HttpWebResponse)req.GetResponse();
     //WebResponse webResponse1 = req.GetResponse();
     sr = new StreamReader(response.GetResponseStream());
     getOutput = sr.ReadToEnd();
     sr.Close();

     foreach (Cookie cook in response.Cookies)
     {
         //cook.Value();
         cookieContainer.Add(cook);
     }
 }
 catch (Exception ex)
 {
     MessageBox.Show(ex.ToString());
 }