[Core]

http://www.ben.geek....indows-phone-7/

Quote

It’s trivially simple to put an Image control onto a page in Windows Phone 7 and point it at a url. Handily, the Image control will also cache that URL, and not request it again for the life of your application. But what if you’re like me and really, really want to save data traffic? I want that image to download once, ever. The only reason that Image control should generate data traffic would be if I reinstall my application.