That makes sense, I'm pretty sure now that I think about it, in every high level language I've working in over the years \ has been the De-facto escape character.
I was more asking the question because of the work I'm doing on the parsing section of the C# code mainly because I was using the Unicode representation of 0x5C to represent the escape character instead of a literal \ in my regular expressions, and I wanted to be certain that was covering both cases (even if the second case is possibly an extremely rare one)
From what I read the Japanese were not as quick to adopt a standard representation for digital text so when unicode was released there was some overlap, the Yen and \ was one case, because many Japanese programers used the yen symbol a lot in their programing (pre unicode). Thinking more about it that makes perfect sense since yen sits in the same place the \ does in the old ASCII table and the majority of the main stream programing languages expected ASCII 92 as the escape character and for them that was the yen key. Of course I'm just speculating but I can imagine how this could throw a wrench in the works
But all that aside you've been quite helpful with the information.
Thanks for the clarification.