}     // end method

        /// <summary>
        /// Get the list of machines which responded to the arp request.
        /// </summary>
        /// <returns>List of arp responders.</returns>
        private List <IPAddress> getArpScanResults()
        {
            using (arpScanner_m = new ArpScanner())
            {
                return(arpScanner_m.GetRespondingMachines());
            } // end using
        }     // end method
        } // end method

        /// <summary>
        /// Get the list of machines which responded to the arp request.
        /// </summary>
        /// <returns>List of arp responders.</returns>
        private List<IPAddress> getArpScanResults()
        {
            using (arpScanner_m = new ArpScanner())
            {
                return arpScanner_m.GetRespondingMachines();
            } // end using
        } // end method