public static string ToUpperChineseRmb(decimal num, UtilityMath.RoundingMode roundMode)
        {
            //if (num < 0 || num > 9999999999999.99M)
            //{
            //    throw new ArgumentOutOfRangeException("金额应为正数,小于(且不等于)10万亿");
            //}

            //string zheng = "整";
            //string shuzi = "零壹贰叁肆伍陆柒捌玖";
            //string danwei = "万仟佰拾亿仟佰拾万仟佰拾元角分";

            //string sourceNum = string.Empty;

            //#region Round -> ToString
            //switch (roundMode)//将num取绝对值并四舍五入取2位小数,然后乘100并转换成字符串形式
            //{
            //    case UtilityMath.RoundingMode.Rounding_4she5ru:
            //        sourceNum = ((long)(UtilityMath.Round(num, 2) * 100)).ToString();
            //        break;
            //    case UtilityMath.RoundingMode.Rounding_4she6ru5chengshuang:
            //        sourceNum = ((long)(System.Math.Round(num, 2) * 100)).ToString();
            //        break;
            //}
            //#endregion

            //char[] source = sourceNum.ToCharArray();

            //StringBuilder sb = new StringBuilder(sourceNum);
            //for (int i = sourceNum.Length - 1; i >= 0; i--)
            //{
            //    sb.Replace(sb[i], shuzi[Convert.ToInt16(sb[i].ToString())], i, 1);
            //}
            //int z = 0;
            //while (!(sb.Length - z * 2 <= 0))
            //{
            //    sb.Insert(sb.Length - z * 2, danwei[danwei.Length - 1 - z]);
            //    z++;
            //}

            //return sb.ToString();
            return ToUpperChineseRmb(num, 0);
        }
 public static string ToUpperChineseRmb(string numString, UtilityMath.RoundingMode roundMode)
 {
     decimal num;
     if (decimal.TryParse(numString, out num))
     {
         return ToUpperChineseRmb(num, roundMode);
     }
     else
     {
         throw new ArgumentException("非数字的字符串。");
     }
 }