using System;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        // Your original string

        var s = "Show me the money!";

        // Define your URL

        var url = "http://forums.asp.net";

        // Replace any instances of money with a URL

        var updated = Regex.Replace(s,"money", m => String.Format("<a href='{0}'>{1}</a>",url,m.Value));

        // Ouput your result

        Console.WriteLine(updated);

    }

}