如何更改UWP TabViewItem转角半径？

<Page.Resources>
    <Style x:Key="CustomTabViewItemStyle" TargetType="TabViewItem">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="TabViewItem">
                    <Grid Background="{TemplateBinding Background}">
                        <Border x:Name="TabViewItemBorder" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="10">
                            <ContentPresenter x:Name="ContentPresenter" ContentTemplate="{TemplateBinding ContentTemplate}" Content="{TemplateBinding Content}" HorizontalAlignment="Center" VerticalAlignment="Center"/>
                        </Border>
                    </Grid>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</Page.Resources>

<TabView>
    <TabViewItem Header="Tab 1" Style="{StaticResource CustomTabViewItemStyle}">
        <!-- Tab 1 Content -->
    </TabViewItem>
    <TabViewItem Header="Tab 2" Style="{StaticResource CustomTabViewItemStyle}">
        <!-- Tab 2 Content -->
    </TabViewItem>
</TabView>