private void btnAdd_Click(object sender, EventArgs e)
        {
            frmNewProduct AddProduct = new frmNewProduct();

            AddProduct.Buttonadd = true;
            AddProduct.ShowDialog();
            Display();
        }
        private void modifyBtn_Click(object sender, EventArgs e)
        {
            frmNewProduct modifyProduct = new frmNewProduct();

            modifyProduct.currentProduct = currentProduct;
            modifyProduct.ShowDialog();
            context.SaveChanges();
            Display();
        }