The real Batgirl

Yvonne Craig will always be Batgirl to me. I'm curious what others do with it but nothing so far has lived up to Yvonne (RIP). The DCAU version was pretty good - particularly when Tara Strong took over the voice.

He respected her privacy. He didn't attempt to find her identity out.

But Batgirl has long red hair and Barbara has short black hair? How could they be the same person?