Fastest way to trim a string and convert it to lower case

Question

I've written a class for processing strings and I have the following problem: the string passed in can come with spaces at the beginning and at the end of the string.

I need to trim the spaces from the strings and convert them to lower case letters. My code so far:

var searchStr = wordToSearchReplacemntsFor.ToLower();
        searchStr = searchStr.Trim();

I couldn't find any function to help me in StringBuilder. The problem is that this class is supposed to process a lot of strings as quickly as possible. So I don't want to be creating 2 new strings for each string the class processes.

If this isn't possible, I'll go deeper into the processing algorithm.

Answer 1

Try method chaining.

Ex:

var s = " YoUr StRiNg".Trim().ToLower();