Regular expression replace in C#

Question

I\'m fairly new to using regular expressions, and, based on a few tutorials I\'ve read, I\'m unable to get this step in my Regex.Replace formatted properly.

Here\'s

Answer 1

Add the following 2 lines

var regex = new Regex(Regex.Escape(","));
sb_trim = regex.Replace(sb_trim, " ", 1);

If sb_trim= John,Smith,100000,M the above code will return "John Smith,100000,M"