Match non-ascii characters with equivalent ascii charaters

public static string RemoveDiacritics(string s)
{
    string normalizedString = s.Normalize(NormalizationForm.FormD);
    StringBuilder stringBuilder = new StringBuilder();
    for (int i = 0; i < normalizedString.Length; i++)
    {
        char c = normalizedString[i];
        if (CharUnicodeInfo.GetUnicodeCategory(c) != UnicodeCategory.NonSpacingMark)
            stringBuilder.Append(c);
    }
    return stringBuilder.ToString();
}