从WPF中的图像中读取元数据

I'm aware that WPF allows you to use images that require WIC codecs to view (for the sake of argument, say a digital camera RAW file); however I can only see that it lets you show the image natively, but I can't see anyway of getting at the meta-data (for example, the exposure time).I'm aware that WPF allows you to use images tha