PowerToys/src/core/Microsoft.PowerToys.Settings.UI/Controls/DummyUserControl.xaml

<UserControl
    x:Class="Microsoft.PowerToys.Settings.UI.Controls.DummyUserControl"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:Microsoft.PowerToys.Settings.UI.Controls"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:muxc="using:Microsoft.UI.Xaml.Controls"
    mc:Ignorable="d"
    d:DesignHeight="300"
    d:DesignWidth="400">

    <Grid>
        <NavigationView x:Name="nvSample" PaneDisplayMode="Left">
            <NavigationView.MenuItems>
                <NavigationViewItem Icon="Play" Content="Menu Item1" Tag="SamplePage1" />
                <NavigationViewItem Icon="Save" Content="Menu Item2" Tag="SamplePage2" />
                <NavigationViewItem Icon="Refresh" Content="Menu Item3" Tag="SamplePage3" />
                <NavigationViewItem Icon="Download" Content="Menu Item4" Tag="SamplePage4" />
            </NavigationView.MenuItems>
            <Frame x:Name="contentFrame"/>
        </NavigationView>
    </Grid>
</UserControl>