Streamreader or Streamwriter?

[jigax]

Not sure what to use or how to use it. But I would like either streamreader or streamwriter to ignore a line depending on it contents. Thanks in advance.

 

[jmcilhinney]

Any time youre appending more than once to a string, use a stringbuilder

Actually, the StringBuilder does come with some overhead. Using a StringBuilder may actually be slower than using string concatenation for a small number of operations. You start to see a benefit from the StringBuilder when making 1 or 2 dozen changes. I haven't actually sat down and tested this rigorously but it's what I've read and I believe I did throw together a quick test a long time ago that bore this out.