或

foreach (var item in new System.Management.ManagementObjectSearcher("Select * from Win32_ComputerSystem").Get()) { Console.WriteLine("Number Of Logical Processors: {0}", item["NumberOfLogicalProcessors"]); }

// 当前计算机上的处理器数量
int processorCount = Environment.ProcessorCount;
int minWorkThreadCount = processorCount * 4;
int minIOWorkThreadCount = processorCount * 2;
//int minWorker, minIOC;
// Get the current settings.
// ThreadPool.GetMinThreads(out minWorker, out minIOC);
// Change the minimum number of worker threads to 300, I/O threads to 200
ThreadPool.SetMinThreads(minWorkThreadCount, minIOWorkThreadCount);