public decimal GetItemsOfProductQuantity(string productId, string[] excludingSkuIds)
{
var retVal = LineItems.InProducts(new[] { productId })
.ExcludeSkus(excludingSkuIds)
.Sum(x => x.Quantity);
return(retVal);
}
public bool IsItemInProduct(string productId)
{
return(LineItems.InProducts(new[] { productId }).Any());
}