private void AddItemToCart(Item item)
{
if (_cartManager.CartContainsItem(_cart, item))
{
MessageBox.Show($"Item code{ item.ItemCode} already exists in cart.", "Add Item to Cart", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
else
{
_cartManager.AddItemToCart(_cart, item);
lbl_cartSize.Text = $"({_cart.Items.Count})";
MessageBox.Show($"Item code{ item.ItemCode} was added to cart.", "Add Item to Cart", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}