How to list order by product ? about shopifysharp HOT 3 CLOSED

public async Task OnGetAsync()
{
    TotalSalesVolume = 0;
    var uniqueOrderIdsForVendor = new HashSet<long>();
    var today = DateTime.Today;
    var threeMonthsAgo = new DateTime(today.Year, today.Month, 1).AddMonths(-2);
    MonthlySalesStats = Enumerable.Range(0, 3).Select(i => today.AddMonths(-i)).ToDictionary(d => d.ToString("yyyy-MM"), d => 0m);
    HttpContext.Session.SetString("VendorName", "VendorName"); // its just a test it will go in the login logic
    var vendorName = HttpContext.Session.GetString("VendorName");
    var productIds = await GetProductIdsByVendorAsync(vendorName);

    var orders = await orderService.ListAsync(new OrderListFilter { CreatedAtMin = threeMonthsAgo, Status = "any" });

    foreach (var order in orders.Items)
    {
        var orderDate = DateTime.Parse(order.CreatedAt.ToString());
        var orderMonth = orderDate.ToString("yyyy-MM");

        if (MonthlySalesStats.ContainsKey(orderMonth))
        {
            foreach (var lineItem in order.LineItems)
            {
                if (!lineItem.ProductId.HasValue || !productIds.Contains(lineItem.ProductId.Value)) continue;
                uniqueOrderIdsForVendor.Add(order.Id.Value);

                var lineItemTotal = (decimal)(lineItem.Price * lineItem.Quantity);
                TotalSalesVolume += lineItemTotal;
                MonthlySalesStats[orderMonth] += lineItemTotal;

                var productSaleInfo = TopSellingProducts.FirstOrDefault(x => x.ProductId == lineItem.ProductId.Value);
                if (productSaleInfo == null)
                {
                    productSaleInfo = new ProductSaleInfo
                    {
                        ProductId = lineItem.ProductId.Value,
                        ProductTitle = lineItem.Title,
                        QuantitySold = (int)lineItem.Quantity,
                        TotalSales = lineItemTotal
                    };
                    TopSellingProducts.Add(productSaleInfo);
                }
                else
                {
                    productSaleInfo.QuantitySold += (int)lineItem.Quantity;
                    productSaleInfo.TotalSales += lineItemTotal;
                }
            }
        }
    }

    TotalOrders = uniqueOrderIdsForVendor.Count;
    TopSellingProducts = TopSellingProducts.OrderByDescending(p => p.TotalSales).Take(10).ToList();
}