ManagementClass class1 = new ManagementClass("Win32_Processor");

foreach (ManagementObject ob in class1.GetInstances())
{
      foreach (PropertyData data in ob.Properties)
              MessageBox.Show(data.Name + ": " + ob.GetPropertyValue(data.Name));

}

public class CPU
{
    private System.Diagnostics.PerformanceCounter perfCounter;

    public CPU()
    {
        perfCounter = new System.Diagnostics.PerformanceCounter();
        perfCounter.CategoryName = "Processor";
        perfCounter.CounterName = "% Processor Time";
        perfCounter.InstanceName = "_Total";
    }
    // gbt die CPU Auslastung des Rechners zurück
    public int GetCpuLoad()
    {
        return Convert.ToInt16(perfCounter.NextValue());
    }
}