opening links into a browser inside an app

Question

im trying to create an rss app for wp7 and my only problem is that when i click to open the specified post it opens the link outside the app to the browser...i want to be able to open the blog post within the app...what i specifically need help with is getting the link of the post...i already created a web browser xml page so it can open but i just dont know how to retrieve the link. is there anybody thay can help me?