MainWindow.xaml

<?xml version="1.0" encoding="utf-8"?>
<Window
    x:Class="CalendarWinUI3.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:CalendarWinUI3"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:models="using:CalendarWinUI3.Models"
    mc:Ignorable="d">

    <NavigationView x:Name="navigationView"
                    ItemInvoked="navigationView_ItemInvoked"
                    SelectionChanged="navigationView_SelectionChanged"
                    BackRequested="navigationView_BackRequested">
        <NavigationView.AutoSuggestBox>
            <AutoSuggestBox/>
        </NavigationView.AutoSuggestBox>
        <NavigationView.MenuItems>
            <NavigationViewItem Icon="Calendar" Tag="Calendar" IsSelected="True">
                <Viewbox>
                    <CalendarView />
                </Viewbox>
            </NavigationViewItem>
            <NavigationViewItemSeparator/>
            <ListView x:Name="subscriptionListView" SelectionMode="None">
                <ListView.ItemTemplate>
                    <DataTemplate x:DataType="models:Subscription">
                        <StackPanel Orientation="Horizontal" Margin="8">
                            <CheckBox IsChecked="{x:Bind IsEnabled}" Content="{x:Bind Name}"/>

                        </StackPanel>
                    </DataTemplate>
                </ListView.ItemTemplate>
            </ListView>
        </NavigationView.MenuItems>

        <NavigationView.FooterMenuItems>
            <NavigationViewItem Icon="Add" Tag="Add">
                <TextBlock Text="Add" />
            </NavigationViewItem>
            <NavigationViewItemSeparator/>
            <NavigationViewItem Icon="Sync" Tag="Sync">
                <TextBlock Text="Sync" />
            </NavigationViewItem>
            <NavigationViewItem Icon="Account" Tag="Account">
                <TextBlock Text="Account" />
            </NavigationViewItem>
        </NavigationView.FooterMenuItems>
        
        <Frame x:Name="contentFrame"/>
    </NavigationView>

</Window>