I have a WP7 app that requires most of its pages to retrieve data from a WCF service. Basically to start using WCF I need to do this:-

```
ServiceClient client = new ServiceClient();

```

after finish ...

```
client.close();

```

I don't think it is right to create an object of the *ServiceClient* in every page but only in App(). So, I am wondering when and where it is right to call `client.close()` in this case?