Styles With Target Types

   
    

<StackPanel xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
            xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <StackPanel.Resources>
        <Style TargetType="{x:Type Button}">
            <Setter Property="FontSize" Value="24" />
            <Setter Property="Foreground" Value="Blue" />
        </Style>

        <Style TargetType="{x:Type TextBlock}">
            <Setter Property="Foreground" Value="Red" />
        </Style>

    </StackPanel.Resources>

    <Button>
        Button with Text Content
    </Button>

    <TextBlock>
        TextBlock Text
    </TextBlock>

    <Button>
        <TextBlock>
            Button with TextBlock Content
        </TextBlock>
    </Button>
</StackPanel>