dataset string dataset

                DataSet ds = new DataSet();
                ds.ReadXml(dataFile);

                Console.WriteLine(data.Length);

                string dataxml = ds.GetXml();

                DataSet ds1 = new DataSet();
                using (System.IO.StringReader xmlSR = new System.IO.StringReader(dataxml))
                {
                    ds1.ReadXml(xmlSR);
                }