A white square on a black background example

protected override void OnLoad( EventArgs e ) {
  base.OnLoad( e );
 
  GL.ClearColor( 0.0f, 0.0f, 0.0f, 0.0f );
  GL.Enable( EnableCap.DepthTest );
}
 
protected override void OnResize( EventArgs e ) {
  base.OnResize( e );
 
  GL.Viewport( ClientRectangle.X, ClientRectangle.Y, ClientRectangle.Width, ClientRectangle.Height );
 
  Matrix4 projection = Matrix4.CreatePerspectiveFieldOfView( (float) Math.PI / 4, (float) Width / Height, 1, 64 );
  GL.MatrixMode( MatrixMode.Projection );
  GL.LoadMatrix( ref projection );
}
 
protected override void OnRenderFrame( FrameEventArgs e ) {
  base.OnRenderFrame( e );
 
  GL.Clear( ClearBufferMask.ColorBufferBit );
 
  Vector3 eye = new Vector3( 0, 0, 10 );
  Vector3 target = new Vector3( 0, 0, 0 );
  Vector3 up = new Vector3( 0, 1, 0 );
 
  Matrix4 modelview = Matrix4.LookAt( eye, target, up );
  GL.MatrixMode( MatrixMode.Modelview );
  GL.LoadMatrix( ref modelview );
 
  GL.Begin( BeginMode.Polygon );
  {
    GL.Color3( 1.0, 1.0, 1.0 );
 
    GL.Vertex3( -0.5, -0.5, 0.0 );
    GL.Vertex3(  0.5, -0.5, 0.0 );
    GL.Vertex3(  0.5,  0.5, 0.0 );
    GL.Vertex3( -0.5,  0.5, 0.0 );
  }
  GL.End();
 
  SwapBuffers();
}