private void TrySessionLogOff()
{
int rval = Shell32.ExitWindowsEx(Shell32.EWX_LOGOFF | Shell32.EWX_FORCE | Shell32.EWX_FORCEIFHUNG, 0);
if (rval == 0) // starting the shutdown failed
{
this.WriteToEventLog("FATAL: ExitWindowsEx Failed", EventLogEntryType.Error);
throw new LogoffException("FATAL: ExitWindowsEx Failed");
}
}