public void Add(Product product,int quantity)
{
CartItem ct;
ct = Items.Where(ci => ci.Product.ProductId == product.ProductId).SingleOrDefault();
if ( ct== null)
{
ct = new CartItem { Product = product, Quantity = quantity };
Items.Add(ct);
}
else
{
ct.Quantity += quantity;
}
}
public void Remove(Product product)
{
Items.RemoveAll(p => p.Product.ProductId == product.ProductId);
}