public static DataSet ConvertXmlToDataSet(Stream XMldata)
        {
            XmlTextReader xmlReader = null;
            StringReader reader = null;
            try
            {
                DataSet xmlDs = new DataSet();
               [color=#FF0000] xmlDs.ReadXml(XMldata);[/color]
                return xmlDs;
            }
            catch (Exception ex)
            {
                return null;
            }
}