private void gocmen_liste_Click(object sender, EventArgs e)
        {
            gocmen_guncel_form frm = new gocmen_guncel_form();

            frm.Show();
            this.Hide();
        }
        private void don_btn_Click(object sender, EventArgs e)
        {
            gocmen_guncel_form formkapa = new gocmen_guncel_form();

            formkapa.Close();
            guncelleme_form_ekranı form = new guncelleme_form_ekranı();

            form.Show();
            this.Hide();
        }