private Product ToObject(SalesData.Product product)
        {
            var objectProduct = new Product(product.ProductID, product.ProductName, product.ProductCost);

            return objectProduct;
        }
        private SalesData.Product ToEntity(Product product)
        {
            var entityProduct = new SalesData.Product()
            {
                ProductID = product.Id,
                ProductName = product.ProductName,
                ProductCost = product.Cost
            };

            return entityProduct;
        }