public void ReduceAmount(int id)
{
ProductLine pl = lineCollection.Where(l => l.Product.Id == id).FirstOrDefault();
if (pl != null)
{
pl.Quantity -= 1;
}
}
public void AddItem(Product prod, int quantity)
{
ProductLine line = lineCollection
.Where(g => g.Product.Id == prod.Id)
.FirstOrDefault();
if (line == null)
{
lineCollection.Add(new ProductLine
{
Product = prod,
Quantity = quantity
});
}
else
{
line.Quantity += quantity;
}
}