A console app that executes code at a set interval

ConsoleTimer.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using OrangeMSE.Data;
using OrangeMSE.Connector;
using System.Threading;
using log4net;
using log4net.Config;
using System.Configuration;
using System.Reflection;

namespace X
{
    class Program
    {
        public Timer timer = null;
        public static Random rnd = new Random();
        private static readonly ILog log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
        static void Main(string[] args)
        {
            XmlConfigurator.Configure();
            log.Info("point collector started");

            timer = new Timer(TimerCallback, null, 0, 200000000);

            bool exit = false;
            while (!exit)
            {
                exit = (Console.ReadLine() == "exit");
            }

        }

        private static void TimerCallback(Object o)
        {
            log.Info("collector started");
            try
            {
                //Code here
            }
            catch(Exception ex)
            {
                HandleException(ex);
            }
            finally
            {
                log.Info("collector ended");
            }
        }

        public static void HandleException(Exception ex)
        {
            log.Error("exception = " + ex.ToString());

            if (bool.Parse(ConfigurationManager.AppSettings["EnableEmail"].ToString()))
            {
                System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage();
                ConfigurationManager.AppSettings["Email"].ToString().Split(';').ToList().ForEach(x =>
                {
                    message.To.Add(x);
                });
                message.Subject = "Error";
                message.From = new System.Net.Mail.MailAddress(ConfigurationManager.AppSettings["From"].ToString());
                message.Body = ex.ToString();

                System.Net.Mail.SmtpClient smtp = new System.Net.Mail.SmtpClient(ConfigurationManager.AppSettings["Smtp"].ToString());
                smtp.Port = int.Parse(ConfigurationManager.AppSettings["SmtpPort"].ToString());
                smtp.EnableSsl = bool.Parse(ConfigurationManager.AppSettings["SmtpSSL"].ToString());
                smtp.Credentials = new System.Net.NetworkCredential(
                    ConfigurationManager.AppSettings["SmtpUser"].ToString(),
                    ConfigurationManager.AppSettings["SmtpPass"].ToString()
                );
                smtp.Send(message);
            }
        }
    }
}