Windows store应用程序在没有互联网的情况下会崩溃。

I am creating my first windows store app and i have several web service calls during startup and also periodically through the app. However I have noticed that my app will ot start/crashes or just closes down when I don't have internet access because of the web serivice calls. I want my app to start up in normal way with some initial data and seem normal even when there is no internet access. The data I get from webservice are mostly weather data that I show in various textboxes and graphs.I am creating my first windows store app and i