using System; using Microsoft.Win32; using System.Security.Permissions; class Class1 { static void Main(string[] args) { RegistryPermission regPermission = new RegistryPermission(RegistryPermissionAccess.AllAccess, "HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersion"); regPermission.Deny(); RegistryKey myRegKey = Registry.LocalMachine; myRegKey = myRegKey.OpenSubKey("SOFTWAREMicrosoftWindows NTCurrentVersion"); Object oValue = myRegKey.GetValue("RegisteredOwner"); Console.WriteLine("OS Registered Owner: {0}", oValue.ToString()); } }