Get Salesforce Data with Partner WSDL

DataTable GetSforceData(string strSQL, int iBatchSize)
{
DataTable dt = null;
partner.SforceService binding = new partner.SforceService();
string strAccountName = "", strAccountPassword = "", strSecurityToken = "";
//get account name, account password and security token here
bll = null;
partner.LoginResult lr = binding.login(strAccountName, 
                                  strAccountPassword + strSecurityToken);
if (!lr.passwordExpired)
{
 binding.Url = lr.serverUrl;
 binding.SessionHeaderValue = new partner.SessionHeader();
 binding.SessionHeaderValue.sessionId = lr.sessionId;

 partner.QueryResult qr = null;
 binding.QueryOptionsValue = new partner.QueryOptions();
 binding.QueryOptionsValue.batchSize = iBatchSize;
 binding.QueryOptionsValue.batchSizeSpecified = true;
 qr = binding.query(strSQL);
 bool done = false;             

 if (qr.size > 0)
 {                  
  dt = new DataTable();
  partner.sObject sOtmp = (partner.sObject)qr.records[0];
  for (int i = 0; i < sOtmp.Any.Length; i++)
  {
   dt.Columns.Add(sOtmp.Any[i].LocalName);                                              
  }
  string[] prValues = new string[sOtmp.Any.Length];
  while (!done)
  {
   for (int i = 0; i < qr.records.Length; i++)
   {
    sOtmp = (partner.sObject)qr.records[i];
    for (int j = 0; j < sOtmp.Any.Length; j++)
    {
     if (sOtmp.Any[j].ChildNodes.Count > 1)
     {
      prValues.SetValue(sOtmp.Any[j].ChildNodes[2].InnerText, j);
     }
     else
     {
      prValues.SetValue(sOtmp.Any[j].InnerText, j);
     }
    }                          

    dt.Rows.Add(prValues);
   }
  
   if (qr.done)
   {
    done = true;
   }
   else
   {
    qr = binding.queryMore(qr.queryLocator);
   }
  }
 }
}

return dt;
}