C#实现cpu信息的查询

class CpuHelper
    {

        #region 变量、属性
        private static float cpuRate=0f;//声明cpu使用率变量

        public static float CpuRate
        {
            get { return cpuRate; }
            set { cpuRate = value; }
        }
        private static Thread hThread = null;//获取CPU使用率的线程
        private static bool isRunning = false;//线程状态的标志

        private const string CategoryName = "Processor";
        private const string CounterName = "% Processor Time";//PerformanceCounter三个参数
        private const string InstanceName = "_Total";

        #endregion

        #region 获取CPU硬件信息

        /// <summary>
        /// 获取当前电脑CPU的频率
        /// </summary>
        /// <returns></returns>
        public static int GetCPUFrequency()
        {
            RegistryKey r = Registry.LocalMachine.OpenSubKey(@"HARDWAREDESCRIPTIONSystemCentralProcessor");
            object c = r.GetValue("~MHz");
            int CpuFrequency = (int)c;
            return CpuFrequency;
        }


        #endregion

        #region 获取CPU的使用率
        /// <summary>
        /// 获取CPU使用率信息,由于CPU使用率是即时信息，采用线程获取
        /// </summary>
        /// <returns></returns>
        public static float GetCpuRate()
        {
            if (!isRunning && hThread == null)
            {
                isRunning = true;
                hThread = new System.Threading.Thread(new System.Threading.ThreadStart(CpuWork));
                if (hThread != null)
                {
                    hThread.Start();
                }
            }
            return cpuRate;
        }

        /// <summary>
        /// 停止获取线程
        /// </summary>
        public static void StopGetCpuWork()
        {
            isRunning = false;

            if (hThread != null)
            {
                if (hThread.IsAlive)
                    hThread.Abort();

                hThread = null;
            }
        }

        /// <summary>
        /// 
        /// </summary>
        private static void CpuWork()
        {
            try
            {
                PerformanceCounter pc = new PerformanceCounter(CategoryName, CounterName, InstanceName);
                while (isRunning)
                {
                    System.Threading.Thread.Sleep(1000); // wait for 1 second
                    float cpuLoad = pc.NextValue();
                    cpuRate = cpuLoad;
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine("获取CPU工作线程方法 异常:" + ex.Message);
            }
        }

        #endregion
    }