Recive PostSubmitter

if (Request.HttpMethod == "POST")
{
Stream dataStream = Request.InputStream;
StreamReader reader = new StreamReader(dataStream);
string responseFromServer = reader.ReadToEnd();
string[] splittempQuery = responseFromServer.Split(("&").ToCharArray());
for (int i = 0; i < splittempQuery.Length; i++)
{
string[] qryValues = splittempQuery[i].Split(("=").ToCharArray());
if (qryValues[0].ToLower() == "op")
{
string aa = qryValues[1].ToString();
}
else if (qryValues[0].ToLower() == "rel_code")
{
string aa = qryValues[1].ToString();
}
else if (qryValues[0].ToLower() == "FREE_TEXT")
{
string aa = qryValues[1].ToString();
}
else if (qryValues[0].ToLower() == "SEARCH")
{
string aa = qryValues[1].ToString();
}
}
reader.Close();
dataStream.Close();
}