static void Main(string[] args)
        {
            var filename = args[0];
            var service = new ServiceImpl();
            var response = service.Execute(new Request {Payload = filename});
            var actualData = BinaryDataContractSerializer.Deserialize<DownloadFileResponse>(response);

            Console.WriteLine($"Congratulation! You have just downloaded {actualData.Data.Length} bytes.");
            Console.WriteLine("How about the total memory consumed?");
            Console.Read();
        }