void FillButton_Click (object sender, EventArgs e)
{
if (_comboBox.Items.Count > 0)
return;
CultureInfo [] cultures = CultureInfo.GetCultures (CultureTypes.SpecificCultures);
foreach (CultureInfo culture in cultures) {
int index = _comboBox.Items.Add (culture.Name);
if (culture.Name == CultureInfo.CurrentCulture.Name)
_comboBox.SelectedIndex = index;
}
}