How can I consume REST wcf Service in windows mobile 7?

void btnGo_Click(object sender, RoutedEventArgs e)
      {
          WebClient proxy = new WebClient();
          string strUri = "http://10.6.16.163:21829/RestService.svc/IsUserAuthenticated;
         

          proxy.OpenReadCompleted+=new OpenReadCompletedEventHandler(proxy_OpenReadCompleted);
          proxy.OpenReadAsync(new Uri(strUri));
      }