private void ModelOnPropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e) { if (e.PropertyName == nameof(SelectedItem) || e.PropertyName == nameof(Entities)) { OnPropertyChanged(e.PropertyName); AddCommand.RiseCanExecute(new object()); ClearCommand.RiseCanExecute(new object()); CreateOrderCommand.RiseCanExecute(new object()); } }