C# GameLoop

    public void RunBad()
    {
        var sw = new Stopwatch();

        int ticks = 0;

        while (true)
        {
            sw.Restart();

            Thread.Sleep(TimePerFrame - ticks);

            ticks = (int)(ticks + sw.ElapsedMilliseconds);

            while (ticks >= TimePerFrame)
            {
                Update(TimePerFrame);

                ticks -= TimePerFrame;
            }
        }
    }