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