private void btnUpdateMarca_Click(object sender, EventArgs e)
        {
            int id = int.Parse(dgvMarca.Rows[dgvMarca.CurrentRow.Index].Cells[0].Value.ToString());

            brandForm = new BrandControlForm(id);
            brandForm.ShowDialog();
        }
 private void btnAddMarca_Click(object sender, EventArgs e)
 {
     brandForm = new BrandControlForm();
     brandForm.ShowDialog();
 }