/// <summary>
        ///  判斷string類型否為數字
        /// </summary>
        /// <param name="strNumber"></param>
        /// <returns></returns>
        public static bool IsNumber(string strNumber)
        {
            string strValidRealPattern = "^([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]+$
 
";
            string strValidIntegerPattern = "^([-]|[0-9])[0-9]*$";
            return !Regex.IsMatch(strNumber, "[^0-9.-]") &&
                   !Regex.IsMatch(strNumber, "[0-9]*[.][0-9]*[.][0-9]*") &&
                   !Regex.IsMatch(strNumber, "[0-9]*[-][0-9]*[-][0-9]*") &&
                   Regex.IsMatch(strNumber, 
 
"(" + strValidRealPattern + ")|(" + strValidIntegerPattern + ")");
        }

        /// <summary>
        /// 判斷string類型否為正整數+0
        /// </summary>
        /// <param name="strNumber"></param>
        /// <returns></returns>
        public static bool IsPositive(string strNumber) => Regex.IsMatch(strNumber, "
 
^\\d+$");


        /// <summary>
        /// 判斷string類型否為金額
        /// </summary>
        /// <param name="strNumber"></param>
        /// <returns></returns>
        public static bool IsAmount(string strNumber) => Regex.IsMatch(strNumber, "^[0-9]+(.[0-9]{2})?$");


        /// <summary>
        /// 判斷string類型否為手機號
        /// </summary>
        /// <param name="strPhone"></param>
        /// <returns></returns>
        public static bool IsPhone(string strPhone) => Regex.IsMatch(strPhone, "^0?(13[0-9]|15[012356789]|18[012356789]|14[012356789]|17[012356789])[0-9]{8}$");


        /// <summary>
        /// 判斷string類型否為固定電話號
        /// </summary>
        /// <param name="strTel"></param>
        /// <returns></returns>
        public static bool IsTel(string strTel) => Regex.IsMatch(strTel, "^(0[0-9]{2,3}-)?([2-9][0-9]{6,7})+(-[0-9]{1,4})?$");


        /// <summary>
        /// 判斷string類型否為郵編
        /// </summary>
        /// <param name="strZipCode"></param>
        /// <returns></returns>
        public static bool IsZipCode(string strZipCode) => Regex.IsMatch(strZipCode, "[0-9]{6}");


        /// <summary>
        /// 判斷string類型否為Email
        /// </summary>
        /// <param name="strEmail"></param>
        /// <returns></returns>
        public static bool IsEmail(string strEmail) => Regex.IsMatch(strEmail, "\\w+([-+.]\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*");


        /// <summary>
        /// 判斷是否為日期
        /// </summary>
        /// <param name="dateStr"></param>
        /// <returns></returns>
        public static bool IsDateString(string dateStr) => DateTime.TryParse(dateStr, out var date);

.Net常用正則判斷方法