Using thread in Silverlight

private void btnStart_Click(object sender, RoutedEventArgs e) { ThreadStart ts = new ThreadStart(Compute); Thread t = new Thread(ts); t.Start(); } private void Compute() { int i = 0; for (; i < 100; i++) { txtV.Dispatcher.BeginInvoke(new Mydelgate(SetV), i); System.Threading.Thread.Sleep(100); } } private delegate void Mydelgate(int i); private void SetV(int i) { txtV.Text = i.ToString(); }