FCU commandline option - OnActivated Override

Appx.xaml.cs

        protected override void OnActivated(IActivatedEventArgs args)
        {
            Frame rootFrame = Window.Current.Content as Frame;

            if(ActivationKind.CommandLineLaunch == args.Kind)
            {
                var commandArgs = args as CommandLineActivatedEventArgs;
                var operation = commandArgs.Operation;
                string arguments = operation.Arguments;
                string activationPath = operation.CurrentDirectoryPath;
                //operation.ExitCode = arguments.Length;

                if (null == rootFrame)
                {
                    rootFrame = new Frame();
                    rootFrame.NavigationFailed += OnNavigationFailed;

                    if (args.PreviousExecutionState == ApplicationExecutionState.Terminated)
                    {
                    }

                    Window.Current.Content = rootFrame;
                }
                
                rootFrame.Navigate(typeof(MainPage), arguments);
                Window.Current.Activate();
            }
        }