kmpdfkit_demo/Demo/Examples/Compdfkit_Tools/Form/FromPropertyControl.xaml

<UserControl x:Class="Compdfkit_Tools.PDFControl.FromPropertyControl"
             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" 
             xmlns:local="clr-namespace:Compdfkit_Tools.PDFControl"
             mc:Ignorable="d" 
             Loaded="UserControl_Loaded"
             Unloaded="UserControl_Unloaded"
             Width="260" Background="#FAFCFF">
    <Grid>
        <TextBlock Name="NoResultText" Foreground="#43474D" FontSize="14" LineHeight="16" TextWrapping="Wrap" Width="190" TextAlignment="Center" VerticalAlignment="Center" HorizontalAlignment="Center">The property panel is empty</TextBlock>
        <Border x:Name="FromPropertyPanel"></Border>
    </Grid>
</UserControl>