protected void AddDeniedPorts(String deniedPorts)
        {
            if (deniedPorts == null || deniedPorts == String.Empty)
            {
                return;
            }
            List <String> p2a = SerialPorts.ExpandComPortRanges(deniedPorts);

            DeniedPorts.AddRange(p2a);
        }
        protected void AddAllowedPorts(String allowedPorts)
        {
            if (allowedPorts == null || allowedPorts == String.Empty)
            {
                return;
            }
            List <String> p2a = SerialPorts.ExpandComPortRanges(allowedPorts);

            AllowedPorts.AddRange(p2a);
        }