title: Questions regarding backkey press of Wp7 Phone Application
body: <p>Question regarding state of pages while deactivation and activation of page,i save the datas for that  particular page alone.when i go back to previous page,by pressing back button,I am getting previous page which does not have data in it.To load the data in the previous page i need to get the instance of previous page ,is there anyway to get the instance of previous pages in Phone Application stack.,Other thing,is that On backkey Press,handling onbackkey press,by navigating to the new instance of the previous phone application page(what will happen to old instance of the previous pages).how to handle these scenarios?</p>