Thread.Sleep(60*1000);
过了60S之后线程不能唤醒?     if ( second == 30)
                {
                   
                    MessageBox.Show(Minute + "");
                    Thread1.Start();
                  
                    MessageBox.Show(Thread1.ThreadState.ToString());
                    Thread.Sleep(60*1000);
                    
                    MessageBox.Show(Thread1.ThreadState.ToString());
                }显示的状态是stoped;
该如何唤醒sleep的线程?