NotificationFlyout/NotificationFlyout.Uwp.UI.Controls/NotificationFlyoutPresenter/NotificationFlyoutPresenter.xaml

<ResourceDictionary
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:controls="using:NotificationFlyout.Uwp.UI.Controls">
    <Style TargetType="controls:NotificationFlyoutPresenter">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="controls:NotificationFlyoutPresenter">
                    <Grid x:Name="Root">
                        <FlyoutBase.AttachedFlyout>
                            <Flyout ShouldConstrainToRootBounds="False">
                                <ContentControl Content="{TemplateBinding Content}" ContentTemplate="{TemplateBinding ContentTemplate}" />
                            </Flyout>
                        </FlyoutBase.AttachedFlyout>
                    </Grid>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</ResourceDictionary>