WPF & Windows Classic Theme Gotcha

The checks/bullets in a checkbox or radio box under the Windows classic theme are colored with the default foreground. If the foreground is white (or transparent), the check is invisible. This doesn't affect other themes.

So, what I'm saying is..

Wrong:

<Radiobutton Foreground="White" Content="Option One"/>

Right:

<Radiobutton IsChecked="true">
   <Label Content="Option One" Foreground="White">
</RadioButton>