String (C#) - Slug (edit)

Input: Chúng tôi là chiến sỹ

Output: chung-toi-la-chien-sy

    //https://stackoverflow.com/questions/2920744/url-slugify-algorithm-in-c
    //https://stackoverflow.com/questions/249087/how-do-i-remove-diacritics-accents-from-a-string-in-net
    //https://www.pipiscrew.com/2017/05/generating-url-slugs-in-net-core/
    public static class Slug
    {
        public static string GenerateSlug(this string phrase)
        {
            string str = phrase.RemoveDiacritics().ToLower();
            // invalid chars
            str = Regex.Replace(str, @"[^a-z0-9\s-]", "");
            // convert multiple spaces into one space
            str = Regex.Replace(str, @"\s+", " ").Trim();
            // cut and trim
            str = str.Substring(0, str.Length <= 45 ? str.Length : 45).Trim();
            str = Regex.Replace(str, @"\s", "-"); // hyphens
            return str;
        }

        public static string RemoveDiacritics(this string text)
        {
            var s = new string(text.Normalize(NormalizationForm.FormD)
                .Where(c => CharUnicodeInfo.GetUnicodeCategory(c) != UnicodeCategory.NonSpacingMark)
                .ToArray());

            return s.Normalize(NormalizationForm.FormC);
        }
    }