Sequentially Sending Request to WebService Server

            DateTime head = DateTime.Now;
            int rstart1 = int.Parse(TextBox3.Text);
            int rend1 = int.Parse(TextBox4.Text);
            int total = r.Next(rstart1,rend1);
            int times = int.Parse(TextBox2.Text);
            times += 1;
            TextBox2.Text = times.ToString();
            Label3.Text = total.ToString();
            for (int i = 0; i < total; i++)
            {
                DateTime start = DateTime.Now;
                Thread t = new Thread(new ThreadStart(this.sendComment));
                t.Start();
                DateTime end = DateTime.Now;
                TimeSpan duration = end.Subtract(start);
                if (10 - duration.TotalMilliseconds > 0)
                    Thread.Sleep(10 - duration.Milliseconds);
                else
                    Thread.Sleep(0);

                TimeSpan duration2 = end.Subtract(head);
                if (duration2.TotalMilliseconds > 1000)
                    break;                
            }
            String dt = DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString()
                              + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString()
                              + DateTime.Now.Millisecond.ToString();
            DataSetForAETableAdapters.performaceTableAdapter adapter = new DataSetForAETableAdapters.performaceTableAdapter();
            adapter.Connection.Open();
            adapter.InsertDraft2WithExpID(total,long.Parse(dt),expid+":" + rstart1.ToString() +"-"+ rend1.ToString());                
            adapter.Connection.Close();
            if (times >= 62)
                Timer2.Enabled = false;
        }