DataSet ds = new DataSet();
            string conn = "Data Source='99.999.1.99,18650';Initial Catalog='CATL';User ID='aaa';Password='bbb';";

            using (SqlConnection con = new SqlConnection(conn))
            {
                using (SqlDataAdapter da = new SqlDataAdapter("select * from DBA.tbl", con)
                {
                    da.Fill(ds);
                }
            }