private void txtStation_KeyDown(object sender, KeyEventArgs e)
 {
     AutocompletionUtils.TextFieldKeyDown(txtStation, lstAutocompleteStation, e.KeyCode, btnSuchen2);
 }
 private void txtZielort_KeyDown(object sender, KeyEventArgs e)
 {
     AutocompletionUtils.TextFieldKeyDown(txtZielort, lstAutocompleteZiel, e.KeyCode, btnSuchen);
 }