Running apps in Mac OSX start a application called X11

using System;
using System.Windows.Forms;
using System.Drawing;
using OpenTK;
using OpenTK.Graphics;
using OpenTK.Graphics.OpenGL;
 
public class HelloWorld : Form
{
  OpenTK.GLControl glControl = new OpenTK.GLControl();
 
  static public void Main()
  {
    Application.Run(new HelloWorld());
  }
 
  	public HelloWorld()
  	{
	    Text = "Hello World";
		Height = 600;
		Width = 800;
		CenterToScreen();
 
		glControl.Dock = DockStyle.Fill; // I hope I got this right     
	    glControl.Paint += (sender, e) =>
	    {
			GL.ClearColor(Color.Black);
       		glControl.SwapBuffers();
	    };
 
		Controls.Add(glControl);
  	}
 
}