Web Scraping sample

//Related to Question at:
//http://http://groups.google.com/group/dotnetdevelopment/browse_thread/thread/6a3a732e06d8598f

class NDNC
{
  static void Main(string[] args)
  {
    // Hit 1: Registered.
    HitNDNC("9999774442");

    // Hit 2: Not Registered.
    HitNDNC("9999988888");
  }

  private static void HitNDNC(string phoneNum)
  {
    bool isRegistered;
    string postData = string.Format("phoneno={0}", phoneNum);
    // Prepare web request...
    try
    {
      String post_response = null;

      ASCIIEncoding encoding = new ASCIIEncoding();
      byte[] data = encoding.GetBytes(postData);

      HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create("http://ndncregistry.gov.in/ndncregistry/saveSearchSub.misc");
      myRequest.Method = "POST";
      myRequest.ContentType = "application/x-www-form-urlencoded";
      myRequest.ContentLength = data.Length;

      using (Stream rqStream = myRequest.GetRequestStream())
      {
        // Send the data.
        rqStream.Write(data, 0, data.Length);
        HttpWebResponse objResponse = (HttpWebResponse)myRequest.GetResponse();
        if (objResponse != null)
        {
          using (StreamReader rnStream = new StreamReader(objResponse.GetResponseStream()))
          {
            post_response = rnStream.ReadToEnd();
          }
        }
      }
      if (!string.IsNullOrEmpty(post_response))
        isRegistered = ParseResponse(post_response);
      else
        // An error occurred.
        Console.WriteLine("An error occurred.");
    }
    catch (Exception ex)
    {
      Console.WriteLine(ex.Message);
    }
  }

  private static bool ParseResponse(string post_response)
  {
    if (post_response.Contains("This Number is Registered in NDNC Registry Database"))
      return true;
    else if (post_response.Contains("This Number is not Registered in NDNC Registry Database"))
      return false;
    else
    {
      //An error occurred. The required page was not found.
      //Find out what the hell happened!
      throw new InvalidOperationException("Oops!");
    }
  }
}