public AddEditPromotionForm(Promotion promotion, int mode, List <Make> makes, PromotionsForm promotionsForm)
{
InitializeComponent();
this.currentPromotion = promotion;
this.mode = mode;
this.promotionsForm = promotionsForm;
initializeForm(makes);
}
//load the promotions form
private void promotionsButton_Click(object sender, EventArgs e)
{
PromotionsForm promotionForm = new PromotionsForm();
promotionForm.Show();
}