C#擷取CPU的利用率

        [STAThread]
        public static void Main()
        {
            string path = AppDomain.CurrentDomain.BaseDirectory;  //擷取基目錄          
            PerformanceCounter pc
            = new PerformanceCounter(CategoryName, CounterName, InstanceName);
            while (true)
            {
                Thread.Sleep(1000); // wait for 1 second
                float cpuLoad = pc.NextValue();
                Say("CPU load = " + cpuLoad + " %." );
            }
           
        }

        private const string CategoryName = "Processor";
        private const string CounterName = "% Processor Time";
        private const string InstanceName = "_Total";

        private static void Say(string txt)
        {
            Console.WriteLine(txt);
        }

        private static void Say()
        {
            Say("");
        }