private static void SendEmail()
        {
            List <UserEmailPojo> listEmail = ReadJSON.GetListEmail(FileUtil.fileEmailJSONPath);
            StringBuilder        logFile   = new StringBuilder();

            logFile.Append("*******Start SendEmail*******");
            logFile.AppendLine();
            foreach (UserEmailPojo currentUser in listEmail)
            {
                String username = currentUser.Username;
                String email    = currentUser.Email;


                Boolean emailSent = EmailUtil.SendEmailToUsers(GetComposedMessage(username), email, "New Planning for " + DateUtil.getNextMonthEnglishLanguage());
                if (emailSent)
                {
                    logFile.AppendLine();
                    logFile.Append("Username= "******"Email= " + currentUser.Email);
                    logFile.AppendLine();
                    logFile.Append("Date= " + DateTime.Now);
                    logFile.AppendLine();
                }
            }

            logFile.AppendLine();
            logFile.Append("*******End SendEmail*******");

            using (StreamWriter file = new StreamWriter(FileUtil.logFile, false))
            {
                file.WriteLine(logFile.ToString());
            }
        }