public void AddItem(Product product, int quantity)
{
CartLine line = lineCollection.Where(m => m.Product.ProductID == product.ProductID).FirstOrDefault();
if (line!=null)
{
line.Quantity += quantity;
}
else
{
lineCollection.Add(new CartLine { Product = product, Quantity = quantity });
}
}
public void RemoveLine(Product product)
{
lineCollection.RemoveAll(m => m.Product.ProductID == product.ProductID);
}