private void AddSettlement_Click(object sender, EventArgs e)
{
var town = new Town(InputTown.Text, ListDistrict.SelectedItem.ToString(), Choice_Type.Text);
town.Add(sqlConnection);
ListTown.DataSource = Town.LoadListState(ListDistrict.SelectedItem.ToString(), Choice_Type.Text, sqlConnection);
InputTown.Text = "";
}