How to Get HardWare Information from CPU like Temparature,Voltage,FanSpeed. code in .Net

I don't think you can get low level system info such as this unless the manufacturer has supplied a special WMI-compliant device driver with the machine. The WMI classes exist but without the device driver all the properties are null.

I did manage to get a value for the current temperature using Acpi:

using System;
using System.Management;

class Test
{
    static void Main()
    {
            ManagementObjectSearcher mySearcher = new

ManagementObjectSearcher("root\\WMI","SELECT * from MSAcpi_ThermalZoneTemperature");             

            foreach (ManagementObject obj in mySearcher.Get())
            {
                              
                if (obj == null)
                {
                    Console.WriteLine("didn't find");
                }
                else
                {
                    Console.WriteLine(obj["CurrentTemperature"].ToString());
                }

            }

    }
}

This gave 2982 on my laptop which is in tenths of a degree Kelvin and so would equate to (2982 - 2732)/10  = 25 degrees celsius. However, I suspect this value may be hardcoded.

The only documentation I could find for the MSAcpi_ThermalZoneTemperature class is the following:

http://www.scriptinternals.com/new/us/support/Internal/WMI_MSAcpi_ThermalZoneTemperature.htm

thanks