public async override void OnViewModelChanged(object sender, PropertyChangedEventArgs e) { base.OnViewModelChanged(sender, e); if (e.PropertyName == PropertiesExtension.GetPropertyName(() => ViewModel.NeedGetContacts)) { if (ViewModel.NeedGetContacts) { var contacts = await inviteService.GetContacts(); ViewModel.SetContactsCollectionFromPlatform(contacts); //contactsAdapter.ItemsSource = ViewModel.Contacts; ViewModel.NeedGetContacts = false; } } }