windows phone storage

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C#

hello

I have read the msdn pages to only found that it seems I can only save the image to the one called "Saved Pitures" and "Camera Roll".
But I want to create a folder for my app specifically.
(Because I don't want to mess with those pictures that is not create by my app.)
I see there is an Albums properties under MediaLibrary. Can I do something with it, like, create a new album?
What that I want to achieve is, I need to create a folder that can be seen in the "Pictures" app and able to save pictures on it.

thank you in advance