SharedResources.xaml

<Page.Resources>
    <Style x:Key="Gauge" TargetType="controls:Gauge">
        <Setter Property="FontFamily" Value="Segoe WP" />
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="controls:Gauge">
                    <Viewbox>
                        <Grid x:Name="Container"
                              Width="200"
                              Height="200"
                              HorizontalAlignment="Center"
                              VerticalAlignment="Center">
                            <Path Name="PART_Scale"
                                  Fill="Red"
                                  Stroke="{TemplateBinding ScaleBrush}"
                                  StrokeThickness="{TemplateBinding ScaleWidth}" />
                            <Path Name="PART_Trail"
                                  Stroke="{TemplateBinding TrailBrush}"
                                  StrokeThickness="{TemplateBinding ScaleWidth}" />
                            <StackPanel HorizontalAlignment="Center"
                                        VerticalAlignment="Center"
                                        Orientation="Vertical">
                                <StackPanel Orientation="Horizontal">
                                    <TextBlock Name="PART_ValueText"
                                               Margin="0 0 0 2"
                                               FontFamily="{TemplateBinding FontFamily}"
                                               FontSize="{TemplateBinding FontSize}"
                                               Foreground="White"
                                               Text="{TemplateBinding Value}"
                                               TextAlignment="Center" />
                                    <TextBlock Margin="0 0 0 2"
                                               FontFamily="{TemplateBinding FontFamily}"
                                               FontSize="{TemplateBinding FontSize}"
                                               Foreground="White"
                                               Text=" %"
                                               TextAlignment="Center" />
                                </StackPanel>
                                <TextBlock FontSize="18"
                                           Text="Profile"
                                           TextAlignment="Center" />
                                <TextBlock FontSize="18"
                                           Text="Strength"
                                           TextAlignment="Center" />
                            </StackPanel>
                        </Grid>
                    </Viewbox>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</Page.Resources>