marcgravell's post answers it pretty well, but I think he meant to say "there's absolutely nothing wrong with using + for individual expressions". Strings in C#

marcgravell's post answers it pretty well, but I think he meant to say "there's absolutely nothing wrong with using + for individual expressions". Strings in C# are immutable, so when you do a concatenation by using the + operator, you're creating another instance of the string in memory. The first one still exists even though you now have the new string. Much like marc said, it's absolutely fine for small amounts, but when you're doing a lot of string operations involving a loop, using StringBuilder will be faster and more memory efficient. This is a good read about it, I highly encourage it: http://www.dotnetperls.com/stringbuilder-1 http://www.dotnetperls.com/stringbuilder-1