Avalonia/samples/ControlCatalog/MainWindow.xaml

<Window xmlns="https://github.com/perspex"
        xmlns:pages="clr-namespace:ControlCatalog.Pages;assembly=ControlCatalog"
        Title="Perspex Control Gallery">
  <TabControl Classes="sidebar">
    <TabControl.Transition>
      <CrossFade Duration="0.25"/>
    </TabControl.Transition>
    <TabItem Header="Border"><pages:BorderPage/></TabItem>
    <TabItem Header="Button"><pages:ButtonPage/></TabItem>
    <TabItem Header="Canvas"><pages:CanvasPage/></TabItem>
    <TabItem Header="Carousel"><pages:CarouselPage/></TabItem>
    <TabItem Header="CheckBox"><pages:CheckBoxPage/></TabItem>
    <TabItem Header="DropDown"><pages:DropDownPage/></TabItem>
    <TabItem Header="LayoutTransformControl"><pages:LayoutTransformControlPage/></TabItem>
    <TabItem Header="Menu"><pages:MenuPage/></TabItem>
    <TabItem Header="Slider"><pages:SliderPage/></TabItem>
    <TabItem Header="TextBox"><pages:TextBoxPage/></TabItem>
    <TabItem Header="ToolTip"><pages:ToolTipPage/></TabItem>
  </TabControl>
</Window>