private static void WriteEnableTariffFunction(string portName, SmlComServiceClient proxy, Guid clientGuid, bool isOn)
{
Console.WriteLine("Setting Enable Tariff function to: " + isOn);
proxy.WriteEnableTariffFunction(clientGuid, portList.FirstOrDefault(m => m.ComPortName == portName), isOn);
var result = proxy.ReadEnableTariffFunction(clientGuid, portList.FirstOrDefault(m => m.ComPortName == portName));
Console.WriteLine("Tariffs enabled read: " + result.Data);
Console.WriteLine();
}