navigation - How to put something extra while navigate another page in windows phone -

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i created listpage , when click in general button in main page have navigate page listpage , put while navigating in order understand page going list, otherwise have create lots of listpages every category 

    private void btn_general_click(object sender, routedeventargs e)     {          navigationservice.navigate(new uri("/listpage.xaml", urikind.relative));      }

you can use page uri put contextual data:

navigationservice.navigate(new uri("/listpage.xaml?list=list1", urikind.relative));

in listpage, can retrieve data looking navigationcontext.querystring property:

protected override void onnavigatedto(navigationeventargs e) {     if (navigationcontext.querystring.containskey("list"))     {         string list = navigationcontext.querystring["list"];         // whatever     } }

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