Program.cs

namespace MiServicioWindows;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.DependencyInjection;

public class Program
{
    public static void Main(string[] args)
    {
        var builder = Host.CreateApplicationBuilder(args);

        builder.Services.AddWindowsService(options =>
        {
            options.ServiceName = "MiServicioWindows";
        });
        builder.Logging.AddEventLog();

        builder.Services.AddHostedService<Worker>();

        var host = builder.Build();

        foreach (var s in builder.Services)
        {
            Console.WriteLine(s.ServiceType.FullName);
        }
        host.Run();
    }
}

public class Worker(ILogger<Worker> logger) : BackgroundService
{
    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
    {
        
        while (!stoppingToken.IsCancellationRequested)
        {
            logger.LogInformation("Worker running at: {time}", DateTimeOffset.Now);
            await Task.Delay(1000, stoppingToken);
        }
    }
}