Windows 7和Vista UAC

WindowsPrincipal pricipal = new WindowsPrincipal(WindowsIdentity.GetCurrent());bool hasAdministrativeRight = pricipal.IsInRole(WindowsBuiltInRole.Administrator);if (!hasAdministrativeRight){    RunElevated(Application.ExecutablePath);    this.Close();    Application.Exit();}private static bool RunElevated(string fileName){    //MessageBox.Show("Run: " + fileName);    ProcessStartInfo processInfo = new ProcessStartInfo();    processInfo.Verb = "runas";    processInfo.FileName = fileName;    try    {        Process.Start(processInfo);        return true;    }    catch (Win32Exception)    {        //Do nothing. Probably the user canceled the UAC window    }    return false;}