c#监测电脑状态

 public class DeviceMonitor
     {

         static readonly PerformanceCounter cpuCounter = new PerformanceCounter("Processor", "% Processor Time", "_Total");
         static readonly PerformanceCounter ramCounter = new PerformanceCounter("Memory", "Available MBytes");
         static readonly PerformanceCounter uptime = new PerformanceCounter("System", "System Up Time");

         public static bool GetInternetAvilable()
         {
             bool networkUp = System.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable();
             return networkUp;
         }

         public static TimeSpan GetSystemUpTime()
         {
             uptime.NextValue();
             TimeSpan ts = TimeSpan.FromSeconds(uptime.NextValue());
             return ts;
         }

         public static string GetPhysicalMemory()
         {
             string str = null;
             ManagementObjectSearcher objCS = new ManagementObjectSearcher("SELECT * FROM Win32_ComputerSystem");
             foreach (ManagementObject objMgmt in objCS.Get())
             {
                 str = objMgmt["totalphysicalmemory"].ToString();
             }
             return str;
         }

         public static string getCurrentCpuUsage()
         {
             return cpuCounter.NextValue() + "%";
         }

         public static string getAvailableRAM()
         {
             return ramCounter.NextValue() + "MB";
         }
     }

c# 监测电脑状态,CPU使用率,物理内存使用,开机时间,网络状态