public KlientEditView(KlientDto dto)
        {
            if (dto == null)
            {
                throw new ArgumentNullException(nameof(dto));
            }

            InitializeComponent();
            _dto = dto;
            KlientNazwiskoTxtBox.Text = dto.Nazwisko;
            service = new KlientService();
        }
 public KlientAddView()
 {
     klientService = new KlientService();
     InitializeComponent();
 }
 public MainWindow()
 {
     InitializeComponent();
     autorService  = new AutorService();
     klientService = new KlientService();
 }