timeout exception

public void Draw()
{
    lock(hmd_locker)
    {
        lock(renderPose_locker)
        {
            lock(eyeTexture_locker)
            {
                try(new TimeoutException(500) ) // tries to run it for 500ms then throws TimeoutException
                {
                    hmd.EndFrame(renderPose, eyeTexture);
                }
                catch(TimeoutException ex)
                {
                    LOG("hmd.EndFrame took longer than expected (500ms), skipping!");
                }
            }
        }
    }
}