gistfile1.txt

DataTable dt;
        DataSet readDs;

        public MainWindow()
        {
            InitializeComponent();

            dt = new DataTable();

            DataColumn dc;
            dc = new DataColumn();
            dc.ColumnName = "Name";
            dt.Columns.Add(dc);

            dc = new DataColumn();
            dc.ColumnName = "Number";
            dt.Columns.Add(dc);

            for (int i = 0; i < 5; i++)
            {
                DataRow dr = dt.NewRow();
                dr["Name"] = "Row " + i;
                dr["Number"] = i;
                dt.Rows.Add(dr);
            }
            DataSet ds = new DataSet();
            ds.Tables.Add(dt);
            ds.WriteXml("out.xml");

            readDs = new DataSet();
            readDs.ReadXml("out.xml");
        }