c#金額轉換大寫

        /// <summary>
        /// 大寫數字
        /// </summary>
        /// <param name="number"></param>
        /// <returns></returns>
        public static String ConvertToChinese(Decimal number)
        {
            var s = number.ToString("#L#E#D#C#K#E#D#C#J#E#D#C#I#E#D#C#H#E#D#C#G#E#D#C#F#E#D#C#.0B0A");
            var d = Regex.Replace(s, @"((?<=-|^)[^1-9]*)|((?'z'0)[0A-E]*((?=[1-9])|(?'-z'(?=[F-L\.]|$))))|((?'b'[F-L])(?'z'0)[0A-L]*((?=[1-9])|(?'-z'(?=[\.]|$))))", "${b}${z}");
            var r = Regex.Replace(d, ".", m => "負元空零壹貳叄肆伍陸柒捌玖空空空空空空空分角拾佰仟萬億兆京垓秭穰"[m.Value[0] - '-'].ToString());
            return r;
        }  

 

這是一段很強大的正則了，暫時還不是太理解，有大神就麻煩解答下