public async void DismissEmployee() { var dialog = new MetroDialogService(); await dialog.Show("Werknemer non-actief zetten", "Weet u zeker dat u " + SelectedEmployee.Name + " op non-actief wilt zetten?"); if (dialog.IsAffirmative != true) { return; } SelectedEmployee.DismissalDate = DateTime.Now; if (!_repository.Update(SelectedEmployee)) { return; } Employees.Remove(SelectedEmployee); RaisePropertyChanged("Employees"); }