Microsoft Java.

C-tic tac toe

Wait it’s not C-Octothorpe?

C octothorpe

C++/++

D♭

C-pound

See-octothorpe. Why, how do you say it?

cocktothorpe

Pfft….C-Pound, duh

Cis. Also Des programming language would be its enharmonic equivalent.

Here we call it C jogo da velha

C number

Or as my mother would call it, after only hearing me mention it a few times: "Sea Shark"

c-hash?

Cé dièse

Sometimes I call it c sharp but I prefer c hashtag

ja mówię ce kratka

It is often called C Hashtag but it is actually C .Net/(slash) Hashtag

C-noughts-and-crosses-board