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