visual studio 2010 - Make application bar button to log out Facebook-Windows Phone -


i want make 1 of application bar icons/buttons log out button facebook. saw thread: logging out facebook using facebook c# sdk in wp7

this code of button(in app.xaml):

    <shell:applicationbariconbutton click="navigationbuttonclick2" iconuri="/assets/appbar/appbar.cancel.rest.png" text="log out" />

this event handler of button(in app.xaml.cs):

 private void navigationbuttonclick2(object sender, eventargs e)     {         facebookclient _fbclient = new facebookclient(fbaccess.accesstoken);         var logoutparams = new dictionary<string, object>();         logoutparams.add("next", "https://www.facebook.com/connect/login_success.html");         //logoutparams.add("",)          var logouturl = _fbclient.getlogouturl(logoutparams);         browsercontrol.navigated += new eventhandler<system.windows.navigation.navigationeventargs>(browsercontrol_navigated);          browsercontrol.navigate(new uri(logouturl.absoluteuri));          if (e.uri.absoluteuri == "https://www.facebook.com/connect/login_success.html")         {               navigationservice.navigate(new uri("/mainpage.xaml", urikind.relative));         }     }      public eventhandler<navigationeventargs> browsercontrol_navigated { get; set; }     public eventhandler<navigationeventargs> browsercontrol { get; set; } }

the error in event handler. errors are:

error 1 name 'fbaccess' not exist in current context

error 2 'system.eventhandler' not contain definition 'navigated' , no extension method 'navigated' accepting first argument of type 'system.eventhandler' found (are missing using directive or assembly reference?)

error 3 'system.eventhandler' not contain definition 'navigate' , no extension method 'navigate' accepting first argument of type 'system.eventhandler' found (are missing using directive or assembly reference?)

error 4 'system.eventargs' not contain definition 'uri' , no extension method 'uri' accepting first argument of type 'system.eventargs' found (are missing using directive or assembly reference?)

can please guide me how fix error?

thank you.


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