Hello, I am trying to extend the Bitmap class so that I can apply my own effects to an image. When I use this code:

namespace ImageEditor
{
    public class Effects : System.Drawing.Bitmap

    {
        public void toBlackAndWhite()
        {
            System.Drawing.Bitmap image = (Bitmap)this;
            AForge.Imaging.Filters.Grayscale filter = new AForge.Imaging.Filters.Grayscale();
            this = filter.Apply(this);
        }
    }
}

I get the following error:

'ImageEditor.Effects': cannot derive from sealed type 'System.Drawing.Bitmap'

So is there a way to get around this or is it simply not possible to extend the class?

Thanks.