C#

class Program
{
    private SDLWindow game;

    static int Main(string[] args)
    {
        int argIndex = args.Length;
        game = new SDLWindow();
        for (int i = 0; i < argIndex; i++)
        {
            switch (args[i])
            {
                case "-width":
                case "-w":
                    game.Width = int.Parse(args[++i]);
                    break;

                case "-height":
                case "-h":
                    game.Height = int.Parse(args[++i]);
                    break;

                case "-game":
                    // baseDir into modDir
                    break;

                default:
                    break;
            }
        }
        game.Run(60);
        return argIndex;
    }
}

class SDLWindow : GameWindow // From OpenTK 2.0 or 3.0pre
{
    public SDLWindow()
    {
        WindowBorder = WindowBorder.Fixed;
    }
}