Test Harness for a regex that is giving me hell right now

Program.cs

using System;
using System.Text.RegularExpressions;

namespace RegexTester
{
    class Program
    {
        private static void Main(string[] args)
        {
            var allText = "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\r\n<doc>\r\n<!-- code start foo csharp -->\r\n<foo />\r\n<bar />\r\n<!-- end code foo -->\r\n<baz />\r\n</doc>";
            var options = RegexOptions.Compiled | RegexOptions.ExplicitCapture | RegexOptions.Multiline;
            var result = Regex.Matches(allText, @"(?s)code start (?<key>[A-Za-z-]*) (?<language>[A-Za-z]*).*[\n](?<value>.*?)[\n].*end code (?<key>[A-Za-z-]*)", options);
            foreach (Match match in result)
            {
                var key = match.Groups["key"];
                var language = match.Groups["language"];
                var value = match.Groups["value"];

                Console.WriteLine("key: {0}, language: {1}, value: {2}", key, language, value);
            }

            Console.ReadKey();
        }
    }
}