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