AspNetCore.Docs/aspnetcore/host-and-deploy/windows-service/sample/Program.cs

#define HandleStopStart // or ServiceOnly ServiceOrConsole
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Hosting.WindowsServices;
using System.Diagnostics;
using System.IO;
using System.Linq;

namespace AspNetCoreService
{
    public class Program
    {
#if ServiceOnly
        #region ServiceOnly
        public static void Main(string[] args)
        {
            var pathToExe = Process.GetCurrentProcess().MainModule.FileName;
            var pathToContentRoot = Path.GetDirectoryName(pathToExe);

            var host = new WebHostBuilder()
            .UseKestrel()
            .UseContentRoot(pathToContentRoot)
            .UseIISIntegration()
            .UseStartup<Startup>()
            .UseApplicationInsights()
            .Build();

            host.RunAsService();
        }
        #endregion
#endif
#if ServiceOrConsole
#region ServiceOrConsole
        public static void Main(string[] args)
        {
            bool isService = true;
            if (Debugger.IsAttached || args.Contains("--console"))
            {
                isService = false;
            }

            var pathToContentRoot = Directory.GetCurrentDirectory();
            if (isService)
            {
                var pathToExe = Process.GetCurrentProcess().MainModule.FileName;
                pathToContentRoot = Path.GetDirectoryName(pathToExe);
            }

            var host = new WebHostBuilder()
            .UseKestrel()
            .UseContentRoot(pathToContentRoot)
            .UseIISIntegration()
            .UseStartup<Startup>()
            .UseApplicationInsights()
            .Build();

            if (isService)
            {
                host.RunAsService();
            }
            else
            {
                host.Run();
            }
        }
#endregion
#endif
#if HandleStopStart
#region HandleStopStart
        public static void Main(string[] args)
        {
            bool isService = true;
            if (Debugger.IsAttached || args.Contains("--console"))
            {
                isService = false;
            }

            var pathToContentRoot = Directory.GetCurrentDirectory();
            if (isService)
            {
                var pathToExe = Process.GetCurrentProcess().MainModule.FileName;
                pathToContentRoot = Path.GetDirectoryName(pathToExe);
            }

            var host = new WebHostBuilder()
            .UseKestrel()
            .UseContentRoot(pathToContentRoot)
            .UseIISIntegration()
            .UseStartup<Startup>()
            .UseApplicationInsights()
            .Build();

            if (isService)
            {
                host.RunAsCustomService();
            }
            else
            {
                host.Run();
            }
        }
#endregion
#endif
    }
}