Facebook Authentication in Background - C# sdk

Question

I am developing a windows phone app using facebook c# sdk. I created a login page to authenticate the user and it also working well. But my problem is, next time when the user open the app, it should be navigated to main page and do the authentication work in background. Is there anyway to do this??

I used navigatedto override method to "redirect the user into the mainpage". I dont know how to authenticate the user in background. Help plss..

Answer 1

将令牌（从fb接收）保存在您的隔离存储中，并检查它在您的HomePage中是否无效，因此相应地导航到“登录”（如果无效）