Create Custom Timer Job for Sending an E mail

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.SharePoint.Administration;
using Microsoft.SharePoint;
using System.Net.Mail;
namespace NotificationCustomTimerJob {
    public class NotificationTimerJob: Microsoft.SharePoint.Administration.SPJobDefinition {
        /// <summary>
        /// Default Consructor
        /// </summary>
        public NotificationTimerJob(): base() {}
            /// <summary>
            /// Parameterized Constructor
            /// </summary>
            /// <param name="jobName">Name of Job to display in central admin</param>
            /// <param name="service">SharePoint Service </param>
            /// <param name="server">Name of the server</param>
            /// <param name="targetType">job type is for content db or job</param>
        public NotificationTimerJob(string jobName, SPService service, SPServer server, SPJobLockType targetType): base(jobName, service, server, targetType) {}
            /// <summary>
            /// Parameterized Constructor
            /// </summary>
            /// <param name="jobName"></param>
            /// <param name="webApplication"></param>
        public NotificationTimerJob(string jobName, SPWebApplication webApplication): base(jobName, webApplication, null, SPJobLockType.ContentDatabase) {
                this.Title = "Email Notification Job";
            }
            /// <summary>
            /// Execute method called when the timer job starts executing. It runs on "DB News Announcements" list which checks for all
            /// approved annoucements and sends out an email to all users for all approved news.
            /// </summary>
            /// <param name="contentDbId"></param>
        public override void Execute(Guid contentDbId) {
                string from = string.Empty;
                string smtpAddress = string.Empty;
                string to = "[email protected]";
                string subject = "Email Notification";
                string body = "<h1> Email Sending from Email Notification Job </h1>";
                SPSecurity.RunWithElevatedPrivileges(delegate() {
                    // get a reference to the current site collection's content database
                    SPWebApplication webApplication = this.Parent as SPWebApplication;
                    SPContentDatabase contentDb = webApplication.ContentDatabases[contentDbId];
                    // get a reference to the "Tasks" list in the RootWeb of the first site collection in the content database
                    SPWeb rootWeb = contentDb.Sites[0].RootWeb;
                    // Get the DB News Announcements List
                    SPList listjob = rootWeb.Lists.TryGetList("Tasks");
                    // Get sender address from web application settings
                    from = rootWeb.Site.WebApplication.OutboundMailSenderAddress;
                    // Get SMTP address from web application settings
                    smtpAddress = rootWeb.Site.WebApplication.OutboundMailServiceInstance.Server.Address;
                    // Send an email if the news is approved
                    bool emailSent = SendMail(smtpAddress, subject, body, true, from, to, null, null);
                    if (listjob != null && emailSent) {
                        SPListItem newListItem = listjob.Items.Add();
                        newListItem["Title"] = string.Concat("Email Notification Sent at : ", DateTime.Now.ToString());
                        newListItem.Update();
                    }
                });
            }
            /// <summary>
            /// Send an email to indented users
            /// </summary>
            /// <param name="smtpAddress">SMTP address to sending email</param>
            /// <param name="subject">subject of email</param>
            /// <param name="body">body of email</param>
            /// <param name="isBodyHtml">whether body is html or text</param>
            /// <param name="from">from address</param>
            /// <param name="to">to users(multiple email address can be seperated by comma(,) )</param>
            /// <param name="cc">cc users</param>
            /// <param name="bcc">bcc users</param>
            /// <returns>Status whether email successfully sent or not</returns>
        public bool SendMail(string smtpAddress, string subject, string body, bool isBodyHtml, string from, string to, string cc, string bcc) {
            bool mailSent = false;
            SmtpClient smtpClient = null;
            try {
                // Assign SMTP address
                smtpClient = new SmtpClient();
                smtpClient.Host = smtpAddress;
                //Create an email message
                MailMessage mailMessage = new MailMessage(from, to, subject, body);
                if (!String.IsNullOrEmpty(cc)) {
                    MailAddress CCAddress = new MailAddress(cc);
                    mailMessage.CC.Add(CCAddress);
                }
                if (!String.IsNullOrEmpty(bcc)) {
                    MailAddress BCCAddress = new MailAddress(bcc);
                    mailMessage.Bcc.Add(BCCAddress);
                }
                mailMessage.IsBodyHtml = isBodyHtml;
                // Send the email
                smtpClient.Send(mailMessage);
                mailSent = true;
            } catch (Exception) {
                mailSent = false;
            }
            return mailSent;
        }
    }
}