internal class Program
{
    static CountdownEvent e = new CountdownEvent(3);
    static bool isOutput = true;

    static int i = 0;
    static void Main(string[] args)
    {
        Thread t = new Thread(ProcessData);
        t.Start();

        Console.WriteLine("启动");
        i++;

        Console.WriteLine("信号1已到");
        e.Signal();
        Console.WriteLine("信号2已到");
        e.Signal();
        Console.WriteLine("信号3已到");
        e.Signal();

        Console.ReadLine();
        i++;
        Console.WriteLine("信号1又到");
        e.Signal();
        Console.WriteLine("信号2又到");
        e.Signal();
        Console.WriteLine("信号3又到");
        e.Signal();

        Console.ReadKey();

    }
    static void ProcessData()
    {
        while (isOutput)
        {
            Console.WriteLine("阻塞等待信号");
            e.Wait();
            Console.WriteLine("阻塞已过，处理：Processed {0}", i);
            e.Reset();
            if (i > 1)
            {
                isOutput = false;
            }
        }
        if (!isOutput)
        {
            e.Dispose();
            Console.WriteLine("处理完成");
        }
    }

}