Avalonia/samples/ControlCatalog/MainView.xaml

<UserControl xmlns="https://github.com/avaloniaui"
        xmlns:pages="clr-namespace:ControlCatalog.Pages;assembly=ControlCatalog"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
  <TabControl Classes="sidebar" Name="Sidebar">
    <TabControl.Transition>
      <CrossFade Duration="0.25"/>
    </TabControl.Transition>
    <TabItem Header="Border"><pages:BorderPage/></TabItem>
    <TabItem Header="Button"><pages:ButtonPage/></TabItem>
    <TabItem Header="ButtonSpinner"><pages:ButtonSpinnerPage/></TabItem>
    <TabItem Header="Calendar"><pages:CalendarPage/></TabItem> 
    <TabItem Header="Canvas"><pages:CanvasPage/></TabItem>
    <TabItem Header="Carousel"><pages:CarouselPage/></TabItem>
    <TabItem Header="CheckBox"><pages:CheckBoxPage/></TabItem>
    <TabItem Header="ContextMenu"><pages:ContextMenuPage/></TabItem>
    <TabItem Header="DatePicker"><pages:DatePickerPage/></TabItem>
    <TabItem Header="DropDown"><pages:DropDownPage/></TabItem>
    <TabItem Header="Expander"><pages:ExpanderPage/></TabItem>
    <TabItem Header="Image"><pages:ImagePage/></TabItem>
    <TabItem Header="LayoutTransformControl"><pages:LayoutTransformControlPage/></TabItem>
    <TabItem Header="Menu"><pages:MenuPage/></TabItem>
	  <TabItem Header="NumericUpDown"><pages:NumericUpDownPage/></TabItem>
    <TabItem Header="ProgressBar"><pages:ProgressBarPage/></TabItem>
    <TabItem Header="RadioButton"><pages:RadioButtonPage/></TabItem>
    <TabItem Header="Slider"><pages:SliderPage/></TabItem>
    <TabItem Header="TextBox"><pages:TextBoxPage/></TabItem>
    <TabItem Header="ToolTip"><pages:ToolTipPage/></TabItem>
    <TabItem Header="TreeView"><pages:TreeViewPage/></TabItem>
  </TabControl>
</UserControl>