The PictureCollection class provides access to pictures in the device's media library.
Use the MediaLibrary.Pictures property to obtain a collection of all pictures in the media library, and use the PictureAlbum.Pictures property to obtain a collection of pictures in a particular picture album.
The PictureCollection does not immediately instantiate instances of all pictures in the collection. Instead, individual Picture objects are created each time a picture is accessed through the collection's Item indexer. See the Remarks section of Item for the resource implications of maintaining references to multiple Picture objects.