Програми для обліку

using Gtk;

class Program
{
    public static void Main()
    {
        Application.Init();
        new FirstWindow();
        Application.Run();
    }

    public static void Quit()
    {
        Application.Quit();
    }
}

using Gtk;

class FirstWindow : Window
{
    public FirstWindow() : base("Test")
    {
        SetDefaultSize(600, 350);
        SetPosition(WindowPosition.Center);

        DeleteEvent += delegate { Program.Quit(); };

        VBox vBox = new VBox();
        Add(vBox);

        HBox hBox = new HBox();
        vBox.PackStart(hBox, false, false, 10);

        Label switchState = new Label() { UseMarkup = true };

        Switch switch_me = new Switch();
        switch_me.ButtonReleaseEvent += (object? o, ButtonReleaseEventArgs e) =>
        {
            switchState.Markup = !switch_me.Active ? "<span color='red'>Включено</span>" : "Виключено";
        };

        hBox.PackStart(new Label("Переключатель"), false, false, 10);
        hBox.PackStart(switch_me, false, false, 10);
        hBox.PackEnd(switchState, false, false, 10);

        ShowAll();
    }
}