test/CircleViewerMaui/AppShell.xaml

<?xml version="1.0" encoding="UTF-8" ?>
<Shell
    x:Class="CircleViewerMaui.AppShell"
    xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:local="clr-namespace:CircleViewerMaui"
    Shell.FlyoutBehavior="Disabled">
    <TabBar>
        <ShellContent
            Title="PDF"
            ContentTemplate="{DataTemplate local:MainPage}" 
            Route="MainPage" />
        <ShellContent
            Title="User Groups"
            ContentTemplate="{DataTemplate local:UserGroups}" 
            Route="UserGroups" />
    </TabBar>

</Shell>