Vista - Displaying XML in WPF Frame Control

Hi,

I am trying to load an XML document to be displayed in a Frame control in
WPF. For Windows Forms, this was as simple as using the WebBrowser control
and navigating to the XML document. You can then add sytle sheets to display
the XML and so forth. I tried this and as many variations of this as I could
think of using the Frame control but my app always fails. I really need to
be able to do this using .NET 3.0 without using Windows Forms but I am not
sure if this is even possible. Does anyone know how to handle this? Any
help is much appreciated.

Thanks