How to catch exception in the main thread if the exception occurs in the secondary thread?

The code snippet for the scenario is given below:

private void button1_Click(object sender, EventArgs e)
    {
        try
        {
            Thread th1 = new Thread(new ThreadStart(Test));
            th1.Start();               
        }
        catch (Exception)
        { 

        }
    }

    void Test()
    {
        for (int i = 0; i < 100; i++)
        {
            Thread.Sleep(100);

            if (i == 2)
                throw new MyException();
        }
    }
}