/// <summary>
        /// Adds new product to stock by utilizing service client.
        /// </summary>
        public void AddProduct()
        {
            bool   isValidProductName = false;
            string productName;

            do
            {
                Console.WriteLine("Please enter product name:");
                productName = Console.ReadLine();
                if (ValidateForLetters(productName) == false)
                {
                    Console.WriteLine("Product name can only contain letters and spaces.");
                }
                else
                {
                    isValidProductName = true;
                }
            } while (isValidProductName == false);
            bool   isValidAmount = false;
            string amountInStock;
            int    amountNumber;

            do
            {
                Console.WriteLine("Please enter product stock amount:");
                amountInStock = Console.ReadLine();
                bool isNumber = int.TryParse(amountInStock, out amountNumber);
                if (isNumber == false || amountNumber < 1)
                {
                    Console.WriteLine("Please enter a positive integer.");
                }
                else
                {
                    isValidAmount = true;
                }
            } while (isValidAmount == false);
            bool   isValidPrice = false;
            string priceString;
            double price;

            do
            {
                Console.WriteLine("Please enter product price:");
                priceString = Console.ReadLine();
                bool isDouble = double.TryParse(priceString, out price);
                if (isDouble == false || price <= 0.0)
                {
                    Console.WriteLine("Please enter a positive price.");
                }
                else
                {
                    isValidPrice = true;
                }
            } while (isValidPrice == false);

            Product product = new Product()
            {
                Name           = productName,
                ItemsRemaining = amountNumber,
                Price          = price
            };

            using (ProductServiceClient wcf = new ProductServiceClient())
            {
                wcf.AddNewProduct(product);
            }
            Console.WriteLine();
            Console.WriteLine("New product added successfully.");
        }