public void OnClosed(EventArgs e)
{
entryPoint.OnClose();
RenderEngine.CleanUp();
GL.BindVertexArray(0);
GL.BindTexture(TextureTarget.Texture2D, 0);
GL.BindFramebuffer(FramebufferTarget.Framebuffer, 0);
GL.BindRenderbuffer(RenderbufferTarget.Renderbuffer, 0);
RenderDataLoader.CleanUp();
}