1、ThreadPool中可以非常方便添加线程，只是线程添加的速度非常慢，不知各位有没有遇到，测试代码如下：

private void TestFunction(object obj)  //测试函数 用于给线程池调用

{
int a = 1;
int b = 1;
int c = 1;
Thread.Sleep(100 * 1000);  //等等100秒
c = a + b;
}

private GetUseThreadPool()   //获取使用的线程池数量

{

int WorkerMax = 0;
int WorkerAvailable = 0;
int WorkerUse = 0;

int IOMax = 0;
int IOAvailable = 0;
int IOUse = 0;

//lock (m_LOCK)
{
ThreadPool.GetMaxThreads(out WorkerMax, out IOMax);
ThreadPool.GetAvailableThreads(out WorkerAvailable,out IOAvailable);
}
WorkerUse = WorkerMax - WorkerAvailable;
IOUse = IOMax - IOAvailable;
lbl_WorkerMax.Text = WorkerMax.ToString();
lbl_WorkerUse.Text = WorkerUse.ToString();
lbl_WorkerAvailable.Text = WorkerAvailable.ToString();
lbl_IOMax.Text = IOMax.ToString();
lbl_IOUse.Text = IOUse.ToString();
lbl_IOAvailable.Text = IOAvailable.ToString();
lbl_UpdateTime.Text = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");

}

private void TestThreadPool()  //测试方法，创建1000个线程

{

 int ThreadNum = 1000;

for (int i = 0; i < ThreadNum; i++)
{
ThreadPool.QueueUserWorkItem(new WaitCallback(TestFunction),null);
}

}

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使用timer每1秒调用1次 GetUseThreadPool() 获取线程池使用数量，发现每秒增加2至4条线程，增加速度非常慢，请各位帮忙看看，谢谢