This delegate can be called
when a match is
found during a replace operation. Several versions
of the overloaded Regex.Replace( ) method take a
MatchEvaluator as a parameter.
Regex.Replace( ) walks through a search string
looking for matches to a given expression and replaces each match
using a specified replacement string. The
MatchEvaluator delegate can be called on each
match, getting passed the match result as a Match
object.
public delegate string MatchEvaluator(Match match);
