/// <summary>
 /// Metoda usuwająca wybrany wiersz z tabeli
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void buttonDelete_Click(object sender, EventArgs e)
 {
     Documents.Delete(Int32.Parse(comboBoxSelectIndex.SelectedItem.ToString()));
     BindDataGridView();
     BindComboBox();
 }