I am currently working on a user control that has white text and a transparent background. Unfortunately because the XAML design view within VS2010 has a white background I cann
Set the background color of the usercontrol to black in the XAML, then set it to transparent in code.
Edit: If you're not comfortable leaving the code this way, then you can revert this change before you release, once you are done with all the designer work, though there is no harm in leaving it in.