如何用秒表测量while循环迭代的平均值

我需要知道一条消息发送到队列需要多长时间(平均)，所以我发送了1000条消息，然后将总数除以1000来获得平均值。

然而，这个控制台应用程序大约需要5-10分钟，最后总毫秒数是一个非常奇怪的数字，比如100或400。除法总是0。我真的拿着我的手表，应用程序需要5到10分钟

我测量这个做错了什么?

static void Main(string[] args)
        {
            string queueConnectionString = CloudConfigurationManager.GetSetting("Microsoft.ServiceBus.ConnectionString");
            QueueClient queueClientEmpresa = QueueClient.CreateFromConnectionString(queueConnectionString, "CapatechSaasApp");
            try
            {
                Console.WriteLine("Testing sending millions of messages");
                int i = 0;
                // Create new stopwatch
                Stopwatch stopwatch = new Stopwatch();
                // Begin timing
                stopwatch.Start();
                while (i < 1000)
                {
                    Empresa empresa = new Empresa()
                    {
                        Nombre = "Empresa:" + i,
                        NIT = "xx",
                        NombreRepresentanteLegal = "xx",
                        TelefonoRepresentanteLegal = "xx",
                        NombreContacto = "x",
                        TelefonoContacto = "x"
                    };
                    i++;
                    BrokeredMessage message = new BrokeredMessage(JsonConvert.SerializeObject(empresa));
                    message.Properties.Add("Operation", "Add");
                    message.Properties.Add("Tipo", "Empresa");
                    queueClientEmpresa.Send(message);
                    //string connectionString = CloudConfigurationManager.GetSetting("Microsoft.ServiceBus.ConnectionString");
                    //Console.WriteLine("Press key to continue");
                    //Console.ReadKey();
                    //ReceiveMessagesEmpresa(connectionString);                  
                }
                stopwatch.Stop();
                Console.WriteLine("Time elapsed milliseconds: {0}", stopwatch.Elapsed.Milliseconds.ToString());
                Console.WriteLine("Time elapsed milliseconds/1000: {0}", (stopwatch.Elapsed.Milliseconds/1000).ToString());
                Console.ReadKey();
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

http://screencast.com/t/fjcFRbf2jM