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  var spawn;
  if (require('os').platform() == "win32") {
    spawn = function(cmd, args, opts) {
      var exec = require('child_process').exec;
      var cmdargs = args.map(function(arg){ return '"' + arg.toString().replace('"', '""') + '"'}).join(' ');
      var cmd = process.env.COMSPEC;
      var fullcmd = cmd + ' /C "' + cmdargs + '"';
      exec(fullcmd, opts);
    }
  }

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open OpenTK;
open OpenTK.Graphics.OpenGL;

[<EntryPoint>]
let main argv = 
    let win = new GameWindow()

    win.Load.Add(fun e -> GL.ClearColor(0.8f, 0.8f, 1.0f, 1.0f));
    win.Unload.Add(fun e -> ());

WernerWenz

using System.Drawing;
using System.Drawing.Imaging;
using OpenTK.Graphics;
using OpenTK.Graphics.OpenGL;

using SDPixelFormat = System.Drawing.Imaging.PixelFormat;
using PixelFormat = OpenTK.Graphics.OpenGL.PixelFormat;

namespace RenderToBmp
{