public void Add(InventoryProduct product, int quantity)
{
for (var i = 0; i < quantity; i++)
{
Add(product);
}
}
public void Add(InventoryProduct product)
{
var thisProductInCart = Items.SingleOrDefault(p => p.Product.Id == product.Id);
if (thisProductInCart == null)
{
var purchaseItem = new PurchaseItem()
{
Product = product,
Quantity = 1
};
Items.Add(purchaseItem);
}
else
{
thisProductInCart.Quantity++;
}
}