String assembly by StringBuilder vs StringWriter and PrintWriter

Question

I recently encountered an idiom I haven\'t seen before: string assembly by StringWriter and PrintWriter. I mean, I know how to use them, but I\'ve always used StringBuilder

Answer 1

StringWriter is what you use when when you want to write to a string, but you're working with an API that expects a Writer or a Stream. It's not an alternative, it's a compromise: you use StringWriter only when you have to.