public string ConvertMoney(decimal Money)
        {
            //金额转换程序
            string MoneyNum = "";//记录小写金额字符串[输入参数]
            string MoneyStr = "";//记录大写金额字符串[输出参数]
            string BNumStr = "零壹贰叁肆伍陆柒捌玖";//模
            string UnitStr = "万仟佰拾亿仟佰拾万仟佰拾圆角分";//模

            MoneyNum = ((long)(Money * 100)).ToString();
            for (int i = 0; i < MoneyNum.Length; i++)
            {
                string DVar = "";//记录生成的单个字符(大写)
                string UnitVar = "";//记录截取的单位
                for (int n = 0; n < 10; n++)
                {
                    //对比后生成单个字符(大写)
                    if (Convert.ToInt32(MoneyNum.Substring(i, 1)) == n)
                    {
                        DVar = BNumStr.Substring(n, 1);//取出单个大写字符
                        //给生成的单个大写字符加单位
                        UnitVar = UnitStr.Substring(15 - (MoneyNum.Length)).Substring(i, 1);
                        n = 10;//退出循环
                    }
                }
                //生成大写金额字符串
                MoneyStr = MoneyStr + DVar + UnitVar;
            }
            //二次处理大写金额字符串
            MoneyStr = MoneyStr + "整";
            while (MoneyStr.Contains("零分") || MoneyStr.Contains("零角") || MoneyStr.Contains("零佰") || MoneyStr.Contains("零仟")
                || MoneyStr.Contains("零万") || MoneyStr.Contains("零亿") || MoneyStr.Contains("零零") || MoneyStr.Contains("零圆")
                || MoneyStr.Contains("亿万") || MoneyStr.Contains("零整") || MoneyStr.Contains("分整"))
            {
                MoneyStr = MoneyStr.Replace("零分", "零");
                MoneyStr = MoneyStr.Replace("零角", "零");
                MoneyStr = MoneyStr.Replace("零拾", "零");
                MoneyStr = MoneyStr.Replace("零佰", "零");
                MoneyStr = MoneyStr.Replace("零仟", "零");
                MoneyStr = MoneyStr.Replace("零万", "万");
                MoneyStr = MoneyStr.Replace("零亿", "亿");
                MoneyStr = MoneyStr.Replace("亿万", "亿");
                MoneyStr = MoneyStr.Replace("零零", "零");
                MoneyStr = MoneyStr.Replace("零圆", "圆零");
                MoneyStr = MoneyStr.Replace("零整", "整");
                MoneyStr = MoneyStr.Replace("分整", "分");
            }
            if (MoneyStr == "整")
            {
                MoneyStr = "零元整";
            }
            return MoneyStr;
        }

private void button1_Click(object sender, EventArgs e)
        {
            MessageBox.Show(ConvertMoney(4).ToString());
        }