Extract all strings between two strings

    private static List<string> ExtractFromBody(string body, string start, string end)
    {
        List<string> matched = new List<string>();

        int indexStart = 0;
        int indexEnd = 0;

        bool exit = false;
        while (!exit)
        {
            indexStart = body.IndexOf(start);

            if (indexStart != -1)
            {
                indexEnd = indexStart + body.Substring(indexStart).IndexOf(end);

                matched.Add(body.Substring(indexStart + start.Length, indexEnd - indexStart - start.Length));

                body = body.Substring(indexEnd + end.Length);
            }
            else
            {
                exit = true;
            }
        }

        return matched;
    }