多线程 Semaphore

代码说明：

class Program    {        static void Main(string[] args)        {            Semaphore seamphore = new Semaphore(5, 5, "SemaphoreExample");             seamphore.WaitOne();            Console.WriteLine("Seamphore 1");            seamphore.WaitOne();            Console.WriteLine("Seamphore 2");            seamphore.WaitOne();            Console.WriteLine("Seamphore 3");