QuickLook/QuickLook.Plugin/QuickLook.Plugin.CLSIDViewer/CLSIDInfoPanel.xaml

<UserControl x:Class="QuickLook.Plugin.CLSIDViewer.CLSIDInfoPanel"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:local="clr-namespace:QuickLook.Plugin.CLSIDViewer"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             Height="192"
             FontSize="14"
             UseLayoutRounding="True"
             mc:Ignorable="d">
    <Grid>
        <TextBlock x:Name="UnsupportedTextBlock"
                   HorizontalAlignment="Center"
                   VerticalAlignment="Center"
                   Visibility="Collapsed" />
        <!--  EMPTY  -->
    </Grid>
</UserControl>