private Stock[] GetStockFromService(string productIds, long divisionId = 9502)
        {
            // create service client
            ArticleServiceClient articleServiceClient = new ArticleServiceClient
            {
                ClientCredentials = { UserName = { UserName = "Sw1ssPr0d@uth", Password = "ff1d2f1e70c7d40c6e017ff330495058424fe2c41afe145cbb0394d8f6f8a7ae" } }
            };

            // split product ids
            string[] productIdsArray = productIds.Split(',');

            // create array for product ids
            ArticleStockRequestSet[] articleStockRequestSet = new ArticleStockRequestSet[productIdsArray.Count()];

            // fill array
            for (int i = 0; i < productIdsArray.Count(); i++)
            {
                articleStockRequestSet[i] = new ArticleStockRequestSet { ArticleNumber = Convert.ToInt32(productIdsArray[i]), DivisionId = divisionId };
            }

            // get all stock
            return articleServiceClient.StockList(articleStockRequestSet);
        }