<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

    <!--  never ever make a default style for TextBlock in App.xaml !!!  -->
    <Style x:Key="MetroTextBlock" TargetType="{x:Type TextBlock}" />

    <Style x:Key="MahApps.Metro.Styles.MetroWatermarkTextBlock"
           BasedOn="{StaticResource MetroTextBlock}"
           TargetType="{x:Type TextBlock}">
        <Setter Property="IsHitTestVisible" Value="False" />
        <Setter Property="Opacity" Value="0.6" />
    </Style>

    <Style x:Key="MetroAutoCollapsingTextBlock"
           BasedOn="{StaticResource MetroTextBlock}"
           TargetType="{x:Type TextBlock}">
        <Setter Property="FontSize" Value="{DynamicResource FloatingWatermarkFontSize}" />
        <Setter Property="Opacity" Value="0.6" />
        <Style.Triggers>
            <Trigger Property="Text" Value="">
                <Setter Property="Visibility" Value="Collapsed" />
            </Trigger>
        </Style.Triggers>
    </Style>

</ResourceDictionary>