public async void RefreshPage (RefreshDealsPageMessage message)
{
await Application.Current.SavePropertiesAsync ();
Deals = NotifyTaskCompletion.Create<ObservableCollection<Deal>> (GetDeals ());
}
public async void RefreshPage(RefreshDealsPageMessage message)
{
await Application.Current.SavePropertiesAsync();
Deals = NotifyTaskCompletion.Create <ObservableCollection <Deal> > (GetDeals());
}