private IEnumerable <output_product> ReadOutputProducts(int runInstanceId)
        {
            IEnumerable <output_product> outProducts;
            var cfg = new CsvConfiguration();

            cfg.RegisterClassMap <OutputProductMap>();
            using (var stream = _contentStorage.ReadOutputContent(runInstanceId, InputFileType.product))
            {
                using (var textReader = new StreamReader(stream, ASCIIEncoding.ASCII)) //TODO: move encoding out
                {
                    var csv = new CsvReader(textReader, cfg);
                    outProducts = csv.GetRecords <output_product>().ToArray();
                }
            }
            return(outProducts);
        }