thread abort (in try-catch bloc)

Question

Hello, in class constructor, I have public class oneclass : System.Windows.Forms.Form { ... public Thread th; ... } on events : public void startsomethig() { ... try { ... } catch(Exception ef) { MessageBox.Show("ef content: " + ef.Message); } } private void Button1_Click(object sender, System.EventArgs e) { th = new Thread(new ThreadStart(startsomething)); th.Start(); } private void Button2_Click(object sender, System.EventArgs e) { th.Abort(); } How do I do if I push on button2 to stop the thread the catch above don't must intercepte stop error thread aborted. ? Thanks in advance. Frédéric