public static void Main(string[] args)
        {
            XmlProcessor xmlProcessor = new XmlProcessor();

            xmlProcessor.ImportData();
            xmlProcessor.ExportProductsInRange();
            xmlProcessor.ExportSoldProducts();
            xmlProcessor.ExportCategoriesByProductsCount();
            xmlProcessor.ExportUsersAndProducts();

            JsonProcessor jsonProcessor = new JsonProcessor();

            jsonProcessor.ImportData();
            jsonProcessor.ExportProductsInRange();
            jsonProcessor.ExportSoldProducts();
            jsonProcessor.ExportCategoriesByProductsCount();
            jsonProcessor.ExportUsersAndProducts();
        }