Hi
However, every response to this question I've seen (admittedly only three or four so far) used StringBuilder. When I ask, "why not use Join?" most C# programmers seem to respond that StringBuilder is "faster" (I haven't measured the difference in performance).
I don't know, but I'd be really surprised if Join wasn't implemented in terms of StringBuilder at worst. Possibly it does a summation of the lengths of the String's in the list, and does exactly one allocation, making it much more efficient. Either way, if there is a function in the libraries, you shouldn't be able to write one which is faster! I suspect people saying "use StringBuilder" have read an article on a website telling them that String concat is slow - but haven't thought about the implications... Thanks Neil