Question

Perl has the \u operator to lowercase a match when using string replacement and regular expressions. Does .Net have anything similar? For example, uppercase all words that start with a <

s/<\(\w*\)/<\U\1/

Answer 1

The way to do these kind of things in .NET is using the MatchEvaluator parameter:

string pattern = @"<(\w*)";
string replaced = Regex.Replace(line, pattern, 
                  x => "<" + x.Groups[1].ToString().ToUpper());     

This reads: Whenever you find the regular expression, replace it with the first group uppercased.