<Style TargetType="local:CiccioFrame">
        <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
        <Setter Property="VerticalContentAlignment" Value="Stretch"/>
        <Setter Property="Background" Value="#fff1f1f1"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="local:CiccioFrame">
                        <Border
                        x:Name="ClientArea"
                        Background="{TemplateBinding Background}"
                        BorderBrush="{TemplateBinding BorderBrush}"
                        BorderThickness="{TemplateBinding BorderThickness}"
                        Margin="{TemplateBinding Margin}"
                        Grid.Row="2">
                        <zoom:ZoomBox x:Name="Zoom">
                            <Grid>
                                <ContentPresenter
                            x:Name="FirstContentPresenter"
                            HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                            VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Grid.Row="1"/>
                                <ContentPresenter
                            x:Name="SecondContentPresenter"
                            HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                            VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Grid.Row="1"/>
                            </Grid>
                    </zoom:ZoomBox>
                        </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>




public class CiccioFrame: TransitionFrame
    {
        public ZoomBox Zoom;

        public CiccioFrame()
        {
            DefaultStyleKey = typeof(CiccioFrame);
        }

        public override void OnApplyTemplate()
        {
            base.OnApplyTemplate();

            var zoom = new DisplayInformationEmulator();
            Zoom = GetTemplateChild("Zoom") as ZoomBox;
            Zoom.ZoomFactor = zoom.DisplayInformationEx.ViewPixelsPerHostPixel;
        }
    }