First can I suggest you get hold of Expresso or one of the other tools that lets you play with Regexes so you get the correct one. I believe you are trying to insert a space in front of every upperCase character, so the simplest Regex is ([A-Z]). Unfortunately however you cannot just Replace these as then you would end up with 76/78 agdevi t2nd lr agdevi 3 Regex regex = new Regex("([A-Z])"); input = regex.Replace("76/78NagdeviSt2ndFlrNagdeviM3"," "); Instead use a MatchEvaluator. This example demonstrates named targets, which is not the simplest way to achieve what you require, but does scale better with more complex Regexes. private string UpperEvaluator(Match match) { return " "+match.Groups["upper"].Value; } public string AddSpaces(string input) { Regex regex = new Regex("(?'upper'([A-Z]))"); return regex.Replace(input, new MatchEvaluator(this.HtmlStripEvaluator)); }
