密碼規則之數字、小寫、大寫、特殊字符，至少滿足3個

        #region 驗證密碼格式
        public static bool ValidatePwd(string pwd)
        {
            return System.Text.RegularExpressions.Regex.IsMatch(pwd, "^(?![a-zA-Z]+$)(?![A-Z0-9]+$)(?![A-Z\\W_]+$)(?![a-z0-9]+$)(?![a-z\\W_]+$)(?![0-9\\W_]+$)[a-zA-Z0-9\\W_]{8,}$");
        }
        #endregion