线程池

 class Program
    {
        static void Main(string[] args)
        {
            int oldMaxWorkingThreads, oldMaxCompletionPortThreads;

            ThreadPool.GetMaxThreads(out oldMaxWorkingThreads, out oldMaxCompletionPortThreads);

            int oldMinWorkingThreads, oldMinCompletionPortThreads;

            ThreadPool.GetMinThreads(out oldMinWorkingThreads, out oldMinCompletionPortThreads);

            Console.WriteLine(string.Format("oldMaxWorkingThreads={0},oldMaxCompletionPortThreads={1}", oldMaxWorkingThreads, oldMaxCompletionPortThreads));
            Console.WriteLine(string.Format("oldMinWorkingThreads={0},oldMinCompletionPortThreads={1}", oldMinWorkingThreads, oldMinCompletionPortThreads));

            Console.WriteLine(Environment.ProcessorCount);//cpu的核数

            Console.ReadKey();
        }
    }