public ScannerLooper1(IPortScanner portScanner,
                       IEmailSender emailSender,
                       IAppSettings appSettings, IMvxLogProvider mvxLogProvider) : base(appSettings, mvxLogProvider)
 {
     _scanr  = portScanner ?? throw new ArgumentNullException();
     _emailr = emailSender ?? throw new ArgumentNullException();
 }
 public ScanWebPortCommand()
 {
     _printer = new PortStatusPrinter(Console.Out);
     _scanner = new WebPortScanner();
 }