ReverseString, a C# interview-question

Question

I had an interview question that asked me for my \'feedback\' on a piece of code a junior programmer wrote. They hinted there may be a problem and said it will be used heavily o

Answer 1

You should use the StringBuilder class to create your resulting string. A string is immutable so when you append a string in each interation of the loop, a new string has to be created, which isn't very efficient.