线程内打开窗体

最近做了个线程，想在线程中打开窗体，结果总是一闪就木有了。在忘了看了下，原来是线程结束后会回收资源。把打开行窗体的资源回收了。

所以在要加点东东：

private void Form1_Load(object sender, EventArgs e)
        {
            int threadId = Thread.CurrentThread.ManagedThreadId;
            textBox1.Text = threadId.ToString(); //将主线程ID显示在文本框中
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Thread thread2 = new Thread(threadPro);//创建新线程
            thread2.Start();
        }
        public void threadPro()
        {
            textBox2.Text = Thread.CurrentThread.ManagedThreadId.ToString();
             MethodInvoker MethInvo = new MethodInvoker(ShowForm2);
             BeginInvoke(MethInvo);
        }
        public void ShowForm2()
        {
            Form2 f2 = new Form2();
            f2.Show();
        }