[C#]
using (Bitmap bm = (Bitmap)Bitmap.FromFile(Server.MapPath("rez/felix-tchverkin-7pkN83wDZwY-unsplash.jpg"))) {
Effects.Invert(bm);
bm.Save(Server.MapPath("IG8_Effects_Invert.jpg"));
}
Example files are shown below.

felix-tchverkin-7pkN83wDZwY-unsplash.jpg

IG8_Effects_Invert.jpg
|