Adding base styles to controls in XAML

gistfile1.txt

<window.resources> 
  <style targettype="{x:Type ContentControl}" x:key="BaseContentControlStyle">
            <setter Property="Foreground" Value="#FF204E93" />  

        <style basedon="{StaticResource BaseContentControlStyle}" targettype="{x:Type Label}">

        <setter Property="FontSize" Value="9.2pt" />         

        <style basedon="{StaticResource BaseContentControlStyle}" targettype="{x:Type Button}">

</Window.Resources>