Windows のワイルドカード文字列を正規表現に変換するメソッド

//
public static Regex WildCardToRegex(string wildCard) {
    if (wildCard == null) {
        throw new ArgumentNullException("wildCard");
    }
    if (wildCard == "") {
        throw new ArgumentException("wildCard");
    }
    CheckInvalidPathChars(wildCard);    //  throws ArgumentException();

    StringBuilder sb = new StringBuilder();

    var splitResult = wildCard.Split(Win32Path.PathSeparator);
    Debug.Assert(splitResult.Length > 0);

    foreach (var separated in splitResult) {
        var temp = separated;

        temp = Regex.Replace(temp, @"([$^\|.{}\[\]()+\\])", @"\$1");
        temp = Regex.Replace(temp, @"\*", @".*");
        temp = Regex.Replace(temp, @"\?", @".");

        sb.AppendFormat("|(?:{0})", temp);
    }
    sb.Remove(0, 1);
    string pattern = @"\\(" + sb.ToString() + ")$";

    return new Regex(pattern, RegexOptions.IgnoreCase);
}