Editing EXIF data in unity

I was checking these articles out:

http://answers.unity3d.com/questions/1192767/is-it-possible-to-edit-description-field-of-jpg-wh.html

http://stackoverflow.com/questions/1755185/how-to-add-comments-to-a-jpeg-file-using-c-sharp

These answers require me to import .NET frameworks such as PresentationCore and WindowsBase which doesn't work with unity. Is there another way I could edit EXIF data?

Any help would be greatly appreciated!