zerotier-one/windows/WinUI/NetworksPage.xaml

<UserControl x:Class="WinUI.NetworksPage"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             mc:Ignorable="d" 
             d:DesignHeight="300" d:DesignWidth="300">
    <ScrollViewer x:Name="MyScrollViewer" HorizontalScrollBarVisibility="Disabled" VerticalScrollBarVisibility="Auto"  HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
        <UniformGrid x:Name="wrapPanel" Background="#FFDDDDDD"  HorizontalAlignment="Stretch" VerticalAlignment="Top" Columns="1">

        </UniformGrid>
    </ScrollViewer>
</UserControl>