PowerToys/Wox/ResultPanel.xaml

<UserControl x:Class="Wox.ResultPanel"
             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="sv" Template="{DynamicResource ScrollViewerControlTemplate}" MaxHeight="300" VerticalScrollBarVisibility="Auto">
        <StackPanel x:Name="pnlContainer"/>
    </ScrollViewer>
</UserControl>