Regex to match all words except a given list

Question

I am trying to write a replacement regular expression to surround all words in quotes except the words AND, OR and NOT.

I have tried the following for the match par

Answer 1

Call me crazy, but I'm not a fan of fighting regex; I limit my patterns to simple things I can understand, and often cheat for the rest - for example via a MatchEvaluator:

    string[] whitelist = new string[] { "and", "not", "or" };
    string input = "foo and bar or blop";
    string result = Regex.Replace(input, @"([a-z0-9]+)",
        delegate(Match match) {
            string word = match.Groups[1].Value;
            return Array.IndexOf(whitelist, word) >= 0
                ? word : ("\"" + word + "\"");
        });

(edited for more terse layout)