Disable task manager using C#

public void SetRegistryKey(Microsoft.Win32.RegistryKey regHive, string regKey, string regName, string regValue)
{
    bool response = false;

    Microsoft.Win32.RegistryKey key = regHive.OpenSubKey(regKey);
    if (key == null)
    {
        regHive.CreateSubKey(regKey, Microsoft.Win32.RegistryKeyPermissionCheck.ReadWriteSubTree);
    }
    key = regHive.OpenSubKey(regKey,true);
    key.SetValue(regName, (string)regValue);
}

SetRegistryKey(RegistryHive.CurrentUser, "Software\Microsoft\Windows\CurrentVersion\Policies\System", "DisableTaskMgr", 1)

(http://stackoverflow.com/questions/2971097/programatically-disabling-taskmanager-using-c-sharp)