怎样判断线程是否执行完

Question

我想判断test方法是否执行完成(test执行完了才可继续调用)
Thread t1 = new Thread(new ThreadStart(test));
t1.Start();

Answer 1

If t1.ThreadState = Threading.ThreadState.Stopped Then
    '执行完成
End If

Answer 2

            Thread t1 = new Thread(test);
            t1.Start();
            //等待t1结束
            while(t1.IsAlive)
            {
                Thread.Sleep(0);
            }
            //do otherthing..

Answer 3

Thread.ThreadState = Threading.ThreadState.Stopped

Answer 4

//开始
Thread th1 = new Thread(test);
            th1.Start();           //判断如果存在，结束线程
            if(th1.IsAlive)
            {
                th1.Abort();
                th1.Join();
            }