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());
}
}
