private void backgroundWorker1_DoWork(object sender, System.ComponentModel.DoWorkEventArgs e)

        {
            BackgroundWorker b = (sender as BackgroundWorker);
            while (true)
            {
                DateTime t = DateTime.Now;
                for (int i = 0; i < 2; i++)
                {
                    Service1Client sc = new Service1Client();
                    sc.Open();
                    for (int j = 0; j < 100; j++)
                    {
                        sc.GetData(4);
                    }
                    sc.Close();
                }
                b.ReportProgress((int)Math.Round(DateTime.Now.Subtract(t).TotalMilliseconds));
            }
        }

        private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {
            Text = e.ProgressPercentage.ToString();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            backgroundWorker1.RunWorkerAsync();
        }