C# and OpenGL

[Smurfas]

Hi, I programin whit C# and OpenGL, but I have one problam. I don't find wha't is wrong. Windows is white, don't do enything.

What's wrong?

And maybe some no good OpenGL+C# book for beginner?

using System;
using System.Collections.Generic;
using System.Text;
using Tao.OpenGl;

namespace image
{
    class Begin
    {
        static void Main(string[] args)
        {
            Glut.glutInit();
            Glut.glutInitDisplayMode(Glut.GLUT_SINGLE | Glut.GLUT_RGB);

            Glut.glutInitWindowSize(400, 400);
            Glut.glutInitWindowPosition(400, 300);
            Glut.glutCreateWindow("Image");

            Init();

            Glut.glutDisplayFunc(new Glut.DisplayCallback(Show));
                                
            Glut.glutMainLoop();

        }

        static void Init()
        {            
           Gl.glClearColor(1.0f, 1.0f, 1.0f, 1.0f); 
        }

        static void Show()
        {
            Gl.glClear(Gl.GL_COLOR_BUFFER_BIT); //Clear buffer

            float[] mas_quad = { -0.5f, -0.5f, -0.5f, 0.5f, 0.5f, 0.5f, 0.5f, -0.5f };
            float[] color_mas = { 0.5f, 0.1f, 0.5f, 0.5f, 0.1f, 0.6f, 0.0f, 0.8f, 0.0f, 0.0f, 0.5f, 4.0f };
            Gl.glVertexPointer(2, Gl.GL_FLOAT, 0, mas_quad);
            Gl.glColorPointer(3, Gl.GL_FLOAT, 0, color_mas);
            Gl.glBegin(Gl.GL_POLYGON);
            for (int i = 0; i < 4; i++)
                Gl.glArrayElement(i);
            Gl.glEnd();
            Gl.glFlush();
        }
      }
}