private void btnAdd_Click(object sender, EventArgs e)
        {
            StateAddcs newForm = new StateAddcs();

            DialogResult = newForm.ShowDialog();
            if (DialogResult == DialogResult.OK)
            {
                lbStates.Items.Add(newForm.state);
            }
        }
 private void btnChange_Click(object sender, EventArgs e)
 {
     if (lbStates.SelectedIndex != -1)
     {
         StateAddcs   newForm      = new StateAddcs();
         DialogResult dialogResult = newForm.ShowDialog();
         if (dialogResult == DialogResult.OK)
         {
             lbStates.Items.RemoveAt(lbStates.SelectedIndex);
         }
         lbStates.Items.Add(newForm.state);
     }
 }