as Microsoft announced support for developing games with XNA in WP8 is not available anymore , but WP8 devices can run games developed to WP7 .
So WP7 games work well on WP8 devices on resolution ( WVGA) as a full screen game .
but on resolutions :
the game doesn't work on all the screen size there is always a black area distorted ( Vertical or horizontal according to chosen resolution) which look like the gamed doesn’t run on a full screen mode for the user.
as there any work around to avoid this distortion ?