Heh, fix the spelling and capitalization of the methods and Visual Studio should tell you that you needed to declare them as 'override'.  ;)

 

These should be your method declarations:

 

public override void OnServiceStartup(object sender, ServiceStartupEventArgs e)
public override void OnServiceShutdown(object sender, EventArgs e)

 

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using IdeaBlade.EntityModel;
using System.IO;

namespace DomainModel
{
    public class ServiceApp : EntityServiceApplication
    {
        public void OnServiceStartUp(object sender, ServiceStartupEventArgs e)
        {

            string LogFile = "logFile.txt";
            LogMessage("Service Starting up ...", LogFile);

           base.OnServiceStartup(sender, e);
        }

        public void OnServceShutdown(object sender, EventArgs e)
        {

            string LogFile = "logFile.txt";
            LogMessage("Service Shuting Down ...", LogFile);

            base.OnServiceShutdown(sender, e);
        }
        public static void LogMessage(String strLogMe, string logfile)
        {
            // if (IsLogOn)
            // {
            FileStream fs = new FileStream(logfile, FileMode.OpenOrCreate, FileAccess.Write);
            StreamWriter m_streamWriter = new StreamWriter(fs);
            m_streamWriter.BaseStream.Seek(0, SeekOrigin.End);
            m_streamWriter.WriteLine(DateTime.UtcNow.ToString() + " : " + strLogMe);
            m_streamWriter.Flush();
            m_streamWriter.Close();
            //}

        }
    }
}