title: C# OpenGL Texture Does not show up
body: <p>In this example I've tried as much as I can to simplify the problem in the hope that someone can solve it for me. </p>
  
  <p>I could not find a simple working example of C# OpenGL code to display a texture.
  So I've tried to make one here.
  Unfortunatley, this code does not work for me.
  I get no errors, but no texture either.</p>
  
  <p>Maybe I set it up incorrectly.
  Perhaps someone could paste this code and see if it runs.</p>
  
  <pre><code>using System;
  using System.Drawing;
  using Tao.OpenGl;
  using Tao.DevIl;
  using System.Windows.Forms;
  
  namespace TextureTest
  {
  public partial class Form1 : Form
  {
      int imageID = 1;
      int texture = 1;
  
      public Form1()
      {
          InitializeComponent();
          OpenGlControl.InitializeContexts();
  
          Il.ilInit();
          Il.ilBindImage(imageID);
  
          bool success = Il.ilLoadImage(@"test.bmp");
  
          Il.ilConvertImage(Il.IL_RGBA, Il.IL_UNSIGNED_BYTE);
  
          Gl.glEnable(Gl.GL_TEXTURE_2D);
          Gl.glBindTexture(Gl.GL_TEXTURE_2D, texture);
          Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MAG_FILTER, Gl.GL_LINEAR);
          Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MIN_FILTER, Gl.GL_LINEAR);
          Gl.glTexImage2D(Gl.GL_TEXTURE_2D, 0, Il.ilGetInteger(Il.IL_IMAGE_BPP), 
                          Il.ilGetInteger(Il.IL_IMAGE_WIDTH), Il.ilGetInteger(Il.IL_IMAGE_HEIGHT), 0, 
                          Il.ilGetInteger(Il.IL_IMAGE_FORMAT), Gl.GL_UNSIGNED_BYTE, Il.ilGetData());
  
          Il.ilDeleteImage(imageID);
  
          Gl.glBegin(Gl.GL_QUADS);
  
              Gl.glTexCoord2f(0.0f, 0.0f); Gl.glVertex2f(-1.0f, -1.0f);
              Gl.glTexCoord2f(1.0f, 0.0f); Gl.glVertex2f(1.0f, -1.0f);
              Gl.glTexCoord2f(1.0f, 1.0f); Gl.glVertex2f(1.0f, 1.0f);
              Gl.glTexCoord2f(0.0f, 1.0f); Gl.glVertex2f(-1.0f, 1.0f);
  
          Gl.glEnd();
  
          Gl.glFlush();
          Gl.glDeleteTextures(1, ref texture); 
       }
  }
  }
  </code></pre>