private void btnUj_Click(object sender, RoutedEventArgs e)
        {
            var ablak = new BoraszReszletek();

            if (ablak.ShowDialog() == true)
            {
                ((List <Borasz>)dgLista.ItemsSource).Add(ablak.Borasz);
                dgLista.Items.Refresh();
            }
        }
        private void btnModositas_Click(object sender, RoutedEventArgs e)
        {
            if (dgLista.SelectedItem != null)
            {
                Borasz        elem  = (Borasz)dgLista.SelectedItem;
                List <Borasz> lista = (List <Borasz>)dgLista.ItemsSource;
                int           index = lista.IndexOf(elem);

                elem = new Adateleres().GetBorasz(elem.Id);
                var ablak = new BoraszReszletek(elem);
                if (ablak.ShowDialog() == true)
                {
                    lista[index] = ablak.Borasz;
                    dgLista.Items.Refresh();
                }
            }
        }