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      = "";
        }