DrawingCanvas.xaml

<UserControl
    x:Name="ControlRoot"
    x:Class="WinUX.Xaml.Controls.Inking.DrawingCanvas"
    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:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    d:DesignWidth="500"
    d:DesignHeight="200">

    <Grid>
        <Grid x:Name="RenderTargetGrid" Background="#FFFFFFFF" />
        <InkCanvas x:Name="DrawingArea" />
    </Grid>
</UserControl>