Registry.LocalMachine

   

using System;
using Microsoft.Win32;
using System.Security.Permissions;

[RegistryPermissionAttribute(SecurityAction.Demand)]
class Class1 {
    static void Main(string[] args) {

        RegistryKey myRegKey = Registry.LocalMachine;
        myRegKey = myRegKey.OpenSubKey("SOFTWAREMicrosoftWindows NTCurrentVersion");

        Object oValue = myRegKey.GetValue("RegisteredOwner");
        Console.WriteLine("OS Registered Owner: {0}", oValue.ToString());

    }
}