void AddTabBar()
{
    var shell = Application.Current.MainPage as AppShell;
    if (shell == null) return;

    // Очищаем текущую структуру
    shell.Items.Clear();

    // Создаем нижнее меню (TabBar)
    var tabBar = new TabBar
    {
        Items =
        {
            new Tab
            {
                Title = "Главная",
                Icon = "globe.png",
                Items = { new ShellContent { Route = "MainPage", ContentTemplate = new DataTemplate(typeof(Main)) } }
            },
            new Tab
            {
                Title = "VPN",
                Icon = "vpn.png",
                Items = { new ShellContent { ContentTemplate = new DataTemplate(typeof(Proxy)) } }
            },
            new Tab
            {
                Title = "Серверы",
                Icon = "server.png",
                Items = { new ShellContent { ContentTemplate = new DataTemplate(typeof(ServerList)) } }
            },
            new Tab
            {
                Title = "Чат",
                Icon = "chat.png",
                Items = { new ShellContent { ContentTemplate = new DataTemplate(typeof(Chat)) } }
            },
            new Tab
            {
                Title = "Магазин",
                Icon = "shop.png",
                Items = { new ShellContent { ContentTemplate = new DataTemplate(typeof(Shop)) } }
            },
            new Tab
            {
                Title = "Профиль",
                Icon = "user_01.png",
                Items = { new ShellContent { ContentTemplate = new DataTemplate(typeof(Profile)) } }
            }
        }
    };

    // Добавляем TabBar в Shell
    shell.Items.Add(tabBar);
}

void AddToolbBar()
{
    var shell = Application.Current.MainPage as AppShell;

    if (shell == null) return;

    // Очищаем текущую структуру
    shell.Items.Clear();

    // 1. Добавляем элементы в Shell
    shell.Items.Add(new FlyoutItem
    {
        Title = "Главная",
        Icon = "globe.png",
        Items = { new ShellContent { Route = "MainPage", ContentTemplate = new DataTemplate(typeof(Main)) } }
    });
    shell.Items.Add(new FlyoutItem
    {
        Title = "Список серверов",
        Icon = "server.png",
        Items = { new ShellContent { ContentTemplate = new DataTemplate(typeof(ServerList)) } }
    });
    shell.Items.Add(new FlyoutItem
    {
        Title = "Чат",
        Icon = "chat.png",
        Items = { new ShellContent { ContentTemplate = new DataTemplate(typeof(Chat)) } }
    });
    shell.Items.Add(new FlyoutItem
    {
        Title = "Магазин",
        Icon = "shop.png",
        Items = { new ShellContent { ContentTemplate = new DataTemplate(typeof(Shop)) } }
    });
    shell.Items.Add(new FlyoutItem
    {
        Title = "Профиль",
        Icon = "user_01.png",
        Items = { new ShellContent { ContentTemplate = new DataTemplate(typeof(Profile)) } }
    });
    shell.Items.Add(new FlyoutItem
    {
        Title = "Proxy",
        Icon = "vpn.png",
        Items = { new ShellContent { ContentTemplate = new DataTemplate(typeof(Proxy)) } }
    });

    // 2. Регистрируем маршруты
    //Routing.RegisterRoute("MainPage", typeof(Main));
    //Routing.RegisterRoute("ProfilePage", typeof(Profile));

    // 3. Активируем Flyout
    shell.FlyoutBehavior = FlyoutBehavior.Flyout;
}