c# Transparency in jpg shows black, not transparent

Question

In a .net 4.8 console app I need to make an area of a jpg file transparent, but when I do, it shows black, not transparent, and I cannot use png file format.

var graphic = Graphics.FromImage(thumbnail);
graphic.Clear(Color.Transparent);

Any idea who to resolve this?

Thanks.

Answer 1

JPEG doesn't support transparency so GIF/PNG are your best bets.