Implicit styles are not automatically applied to windows in wpf, and related methods are provided in hc to solve this problem.

NOTE

The default style of the navigationWindow can be set via

ConfigHelper.Instance.SetNavigationWindowDefaultStyle();

<NavigationWindow x:Class="HandyControlDemo.Window.NavigationWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        WindowStartupLocation="CenterScreen"
        Title="Title" 
        Height="450" 
        Width="800">
</NavigationWindow>

private readonly List<Page> _pageList;

        public NavigationWindow()
        {
            InitializeComponent();

            AddHandler(ButtonBase.ClickEvent, new RoutedEventHandler(Button_Click));

            _pageList = new List<Page>();
            for (var i = 0; i < 5; i++)
            {
                _pageList.Add(CreatePage(i));
            }

            Navigate(_pageList[0]);
        }

        private Page CreatePage(int index)
        {
            var indexStr = index.ToString();
            var button = new Button
            {
                HorizontalAlignment = HorizontalAlignment.Center,
                VerticalAlignment = VerticalAlignment.Center,
                Content = indexStr,
                Width = 320,
                Tag = indexStr
            };

            return new Page
            {
                Title = indexStr,
                Content = button
            };
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            if (e.OriginalSource is Button button && button.Tag is string tag)
            {
                var index = tag.Value<int>() + 1;
                Navigate(index >= _pageList.Count ? _pageList[0] : _pageList[index]);
            }
        }
    }