C#：18、15位身份证号验证

　　　/// <summary>
        /// 验证位身份证
        /// </summary>
        /// <param name="Id">身份证号码</param>
        /// <returns>是否真实身份证</returns>
        public static bool CheckIDCards(string Id)
        {
            int intLen = Id.Length;
            long n = 0;

            if (intLen == 18)
            {
                if (long.TryParse(Id.Remove(17), out n) == false || n < Math.Pow(10, 16) || long.TryParse(Id.Replace('x', '0').Replace('X', '0'), out n) == false)
                {
                    return false;//数字验证
                }
                string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
                if (address.IndexOf(Id.Remove(2)) == -1)
                {
                    return false;//省份验证
                }
                string birth = Id.Substring(6, 8).Insert(6, "-").Insert(4, "-");
                DateTime time = new DateTime();
                if (DateTime.TryParse(birth, out time) == false)
                {
                    return false;//生日验证
                }
                string[] arrVarifyCode = ("1,0,x,9,8,7,6,5,4,3,2").Split(',');
                string[] Wi = ("7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2").Split(',');
                char[] Ai = Id.Remove(17).ToCharArray();
                int sum = 0;
                for (int i = 0; i < 17; i++)
                {
                    sum += int.Parse(Wi[i]) * int.Parse(Ai[i].ToString());
                }
                int y = -1;
                Math.DivRem(sum, 11, out y);
                if (arrVarifyCode[y] != Id.Substring(17, 1).ToLower())
                {
                    return false;//校验码验证
                }
                return true;//符合GB11643-1999标准
            }
            else if (intLen == 15)
            {
                return CheckIDCards(Per15To18(Id));
            }
            else
            {
                return false;//位数不对
            }
        }

        /// <summary>
        /// 15位身份证号 换算 18位身份号
        /// </summary>
        /// <param name="perIDSrc">15位身份证号</param>
        /// <returns></returns>
        public static string Per15To18(string perIDSrc)
        {
                int iS = 0;
                //加权因子常数
                int[] iW = new int[] { 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 };
                //校验码常数
                string LastCode = "10X98765432";
                //新身份证号
                string perIDNew;
                perIDNew = perIDSrc.Substring(0, 6);
                //填在第6位及第7位上填上‘1’，‘9’两个数字
                perIDNew += "19";
                perIDNew += perIDSrc.Substring(6, 9);

                //进行加权求和
                for (int i = 0; i < 17; i++)
                {
                    iS += int.Parse(perIDNew.Substring(i, 1)) * iW[i];
                }

                //取模运算，得到模值
                int iY = iS % 11;
                //从LastCode中取得以模为索引号的值，加到身份证的最后一位，即为新身份证号。
                perIDNew += LastCode.Substring(iY, 1);
                return perIDNew;
        }