using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Diagnostics;

using System.IO;

using System.Linq;

using System.ServiceProcess;

using System.Text;

using System.Threading.Tasks;

using System.Timers;

namespace MyFirstService {

public partial class Service1: ServiceBase {

Timer timer = new Timer(); // name space(using System.Timers;)

public Service1() {

InitializeComponent();

}

protected override void OnStart(string[] args) {

WriteToFile("Service is started at " + DateTime.Now);

timer.Elapsed += new ElapsedEventHandler(OnElapsedTime);

timer.Interval = 5000; //number in milisecinds

timer.Enabled = true;

}

protected override void OnStop() {

WriteToFile("Service is stopped at " + DateTime.Now);

}

private void OnElapsedTime(object source, ElapsedEventArgs e) {

WriteToFile("Service is recall at " + DateTime.Now);

}

public void WriteToFile(string Message) {

string path = AppDomain.CurrentDomain.BaseDirectory + "\\Logs";

if (!Directory.Exists(path)) {

Directory.CreateDirectory(path);

}

string filepath = AppDomain.CurrentDomain.BaseDirectory + "\\Logs\\ServiceLog_" + DateTime.Now.Date.ToShortDateString().Replace('/', '_') + ".txt";

if (!File.Exists(filepath)) {

// Create a file to write to.

using(StreamWriter sw = File.CreateText(filepath)) {

sw.WriteLine(Message);

}

} else {

using(StreamWriter sw = File.AppendText(filepath)) {

sw.WriteLine(Message);

}

}

}

}

}