老师我在这里把逻辑反着写，为什么while里面的东西没有打印出来呢？
Console.WriteLine(“Hello World!”);

        Thread t = new Thread(() => {

            PrintHello(cts.Token);
          
            });



        while (!t.IsAlive)
        {
            Console.WriteLine("quit ");
            Console.WriteLine("quit ");
            Console.WriteLine("quit ");
            break;
        }
        Console.WriteLine("quit ");

输出结果如下：

    private static void PrintHello(CancellationToken c)
    {
        int i = 0;
        while (i++ < 10)
        {
            Thread.Sleep(300);
            Console.WriteLine("PrintHello");
        }

    }