/// 
/// 身份证/// 
[Serializable]public class IDCard{    /// 
    /// 身份证号    /// 
    public string IDCardNum { get; set; }    /// 
    /// 行政区    /// 
    public string Canton { get; private set; }    /// 
    /// 出生日期    /// 
    public DateTime Birthday { get; private set; }    /// 
    /// 性别(0-女；1-男)    /// 
    public int Gander { get; private set; }    /// 
    /// 是否为合法身份证号    /// 
    public bool IsIDCard { get; private set; }     public IDCard() { }     public IDCard(string IDnumber)    {        this.IDCardNum = IDnumber;    }      /// 
    ///     /// 
    /// 
    
         /// 
         public static IDCard Parse(string number)    {        IDCard idCard = new IDCard(number);         const int s5bits = 15;        const int s8bits = 18;         #region 15位        if (number.Length == s5bits)  //15位的处理        {            //检查输入是否为数字            for (int i = 0; i < number.Length; i++)            {                if ((number[i] < '0') || (number[i] > '9'))                {                    throw new FormatException("身份证号错误");                }            }             //出生日期            string birthday = "19" + number.Substring(6, 6);            string year = birthday.Substring(0, 4);            string month = birthday.Substring(4, 2);            string day = birthday.Substring(6, 2);            birthday = string.Format("{0}-{1}-{2}", year, month, day);             DateTime date = new DateTime();            if (DateTime.TryParse(birthday, out date))            {                idCard.Birthday = date;            }            else            {                throw new InvalidCastException("身份证号出生日期错误");            }                        //性别            if ((number[s5bits - 1] == '0') || (number[s5bits - 1] % 2 == 0))            {                idCard.Gander = 0; // 女            }            else            {                idCard.Gander = 1; // 男            }             idCard.IsIDCard = true;            return idCard;        }        #endregion         #region 18位        else if (number.Length == s8bits)  //18位的处理        {            // 检查前17位是否为数字            for (int i = 0; i < number.Length -1; i++)            {                if ((number[i] < '0') || (number[i] > '9'))                {                    throw new FormatException("身份证号错误");                }            }             char end = number[s8bits - 1];  //最后一位             //最后1位是x转成大写X            if (end == 'x')            {                end = 'X';                number = number.Substring(0, s8bits - 1) + end;            }             if (!(end == 'X' || (end >= '0' && end <= '9')))            {                throw new FormatException("身份证号错误");            }                        /// 校验            int num = 0;            char proof;            for (int i = 17; i > 0; i--)            {                num = num + (int)(Math.Pow(2, i) % 11) * (number[17 - i] - 48);            }            num %= 11;            switch (num)            {                case 0:                    proof = '1';                    break;                case 1:                    proof = '0';                    break;                case 2:                    proof = 'X';                    break;                default:                    proof = (char)(12 - num + 48);                    break;            }             if (end != proof)  //最后一位与校验码不符            {                throw new FormatException("身份证号错误");            }             //出生日期            string birthday = number.Substring(6, 8);            string year = birthday.Substring(0, 4);            string month = birthday.Substring(4, 2);            string day = birthday.Substring(6, 2);            birthday = string.Format("{0}-{1}-{2}", year, month, day);             DateTime date = new DateTime();            if (DateTime.TryParse(birthday, out date))            {                idCard.Birthday = date;            }            else            {                throw new InvalidCastException("身份证号出生日期错误");            }             //行政区            idCard.Canton = number.Substring(0, 6);             //性别            if ((number[16] == '0') || (number[16] % 2 == 0))            {                idCard.Gander = 0;  //女            }            else            {                idCard.Gander = 1;  //男            }             idCard.IsIDCard = true;            return idCard;        }        #endregion        else        {            throw new FormatException("无效的身份证号码位数：" + number.Length);        }    }     public static bool TryParse(string number, out IDCard card)    {        IDCard idCard = null;        bool isIdCard = true;        try        {            Parse(number);        }        catch (Exception)        {            isIdCard = false;        }        card = idCard;        return isIdCard;    }}