InAppNotification.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:local="using:Microsoft.Toolkit.Uwp.UI.Controls">

    <ResourceDictionary.MergedDictionaries>
        <ResourceDictionary Source="ms-appx:///Microsoft.Toolkit.Uwp.UI.Controls.Core/InAppNotification/Styles/MSEdgeNotificationStyle.xaml" />
        <ResourceDictionary Source="ms-appx:///Microsoft.Toolkit.Uwp.UI.Controls.Core/InAppNotification/Styles/VSCodeNotificationStyle.xaml" />
    </ResourceDictionary.MergedDictionaries>

    <Style x:Key="BaseInAppNotificationsStyle"
           TargetType="local:InAppNotification">
        <Setter Property="Background" Value="{ThemeResource SystemControlBackgroundChromeMediumLowBrush}" />
        <Setter Property="Foreground" Value="{ThemeResource SystemControlForegroundBaseHighBrush}" />
        <Setter Property="BorderBrush" Value="{ThemeResource SystemControlTransientBorderBrush}" />
        <Setter Property="Visibility" Value="Collapsed" />
        <Setter Property="BorderThickness" Value="0" />
        <Setter Property="HorizontalAlignment" Value="Stretch" />
        <Setter Property="VerticalAlignment" Value="Bottom" />
        <Setter Property="MinHeight" Value="55" />
        <Setter Property="FontSize" Value="14" />
        <Setter Property="RenderTransformOrigin" Value="0.5,1" />
        <Setter Property="Margin" Value="24,12" />
        <Setter Property="Padding" Value="24,12" />
        <Setter Property="MaxWidth" Value="960" />
        <Setter Property="MinWidth" Value="132" />
        <Setter Property="AnimationDuration" Value="0:0:0.100" />
        <Setter Property="VerticalOffset" Value="100" />
        <Setter Property="HorizontalOffset" Value="0" />
        <Setter Property="AutomationProperties.LandmarkType" Value="Custom" />
        <!--  The setter value is localized using x:Uid but we still need to set it explicitly to avoid a compiler warning  -->
        <Setter x:Uid="WCT_InAppNotification_LandmarkProperty" Property="AutomationProperties.LocalizedLandmarkType" Value="Notification" />
        <Setter Property="AutomationProperties.LiveSetting" Value="Assertive" />
        <Setter Property="Template" Value="{StaticResource MSEdgeNotificationTemplate}" />
    </Style>

    <Style BasedOn="{StaticResource BaseInAppNotificationsStyle}" TargetType="local:InAppNotification"/>

</ResourceDictionary>