public DataTable GetDemoData()
        {
            var conn = System.Data.OracleClient.OracleClientFactory.Instance.CreateConnection();
            conn.ConnectionString = "Data Source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.1.55)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=CSFRAMEWORKV6_SYSTEM)));User Id=test;Password=test123456;Pooling=true;Max Pool Size=512;Connection Lifetime=0;";
            var cmd = System.Data.OracleClient.OracleClientFactory.Instance.CreateCommand();
            cmd.CommandType = CommandType.Text;
            cmd.CommandText = "SELECT * FROM \"tb_MyUser\"";
            cmd.Connection = conn;
            var adp = OracleClientFactory.Instance.CreateDataAdapter();
            adp.SelectCommand = cmd;
            DataSet ds = new DataSet();
            adp.Fill(ds);
            conn.Dispose();

            return ds.Tables[0];
        }