I started using C# towards the end of the 1.0 beta or maybe just after RTM...I embarrassingly called it "C pound" for quite a while. Because, even as someone born and raised in the US, pretty much my only exposure to the symbol was in the context of phones. "Call me at blah, pound one-two-three" as in the extension is "#123".
Remember, it was originally release +20 years ago (goddamn, I feel old now); recorded video or even audio over the internet were much, much, MUCH rarer then, when "high-speed" speed internet for a lot of people meant a 56K modem.
Back then, most developer's first exposure to C# then was likely in either print form (books or maybe MSDN magazine).
Not alone, also got those CDs for MSFT partners only, with the draft documentation written in red, before it became know to the outside world?
Also got a few of those magazine CDs, in some box.