https://clarionhub.com/t/net-windows-service-to-complement-a-clarion-desktop-application/1115

Program.cs

using Hangfire;
using Microsoft.Owin;
using Microsoft.Owin.Hosting;
using Owin;
using Serilog;
using System;
using System.Data.SqlClient;
using Topshelf;

[assembly: OwinStartup(typeof(MyScheduler.Startup))]

namespace MyScheduler
{

    internal class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            app.UseHangfireDashboard();
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            Log.Logger = new LoggerConfiguration()
                .MinimumLevel.Debug()
                .WriteTo.RollingFile(AppDomain.CurrentDomain.BaseDirectory + "logs\\MyScheduler-{Date}.log")
                .WriteTo.ColoredConsole()
                .CreateLogger();
            Log.Information("Hello, world!");

            HostFactory.Run(x =>
            {
                x.Service<JobHost>(s =>
                {
                    s.ConstructUsing(name => new JobHost());
                    s.WhenStarted(tc => tc.Start());
                    s.WhenStopped(tc => tc.Stop());
                });
                x.RunAsNetworkService();
                x.SetServiceName("MyScheduler");
                x.SetDisplayName("MyScheduler");
                x.SetDescription("Sample MyScheduler Host");
                x.UseSerilog();
                // x.SetInstanceName("MyService"); <-- this should be handy for multiple Trips instances!
            });
        }
    }

    public class JobHost
    {
        private BackgroundJobServer _server;
        private string _connectionString = @"Server=myserver;Database=Hangfire;User Id=username;Password=****;";
        private IDisposable app;

        public JobHost()
        {
            GlobalConfiguration.Configuration.UseSqlServerStorage(_connectionString);
            RecurringJob.AddOrUpdate(() => DoStuff(), Cron.Minutely);
        }

        public void DoStuff()
        {
            Log.Information("It is {0} and all is well", DateTime.Now);
            GetServerDateTime();
        }

        public void Start() {
            app = WebApp.Start<Startup>("http://localhost:5000");
            _server = new BackgroundJobServer();
        }
        public void Stop() {
            app.Dispose();
            _server.Dispose();
        }

        public void GetServerDateTime()
        {
            string queryString = "SELECT GetDate() as CurrentDateTime;";
            using (SqlConnection connection = new SqlConnection(_connectionString))
            {
                SqlCommand command = new SqlCommand(queryString, connection);
                connection.Open();
                SqlDataReader reader = command.ExecuteReader();
                try
                {
                    while (reader.Read())
                    {
                        Log.Information("SQL DateTime: " + reader["CurrentDateTime"]);
                    }
                }
                finally
                {
                    // Always call Close when done reading.
                    reader.Close();
                }
            }
        }
    }
}