private async Task DeleteEstablishment() { var message = await networkAPI.DeleteEstablishment(Establishment.EstablishmentId); await MessageUtils.ShowDialog("Vestiging verwijderen", message.Item1); if (message.Item2) { mainPageViewModel.BackButtonPressed(); mainPageViewModel.NavigationHistoryItems.RemoveAll(v => v.GetType() == typeof(EstablishmentDetailViewModel)); } }