Почему может не запускаться BackgroundService в Winforms приложении?

Question

Александр Никульшин @xasya89

C# dev

ASP.NET
.NET

Почему может не запускаться BackgroundService в Winforms приложении?

Есть Winforms приложение. в progrm.cs использую Host. При запуске ошибок не возникает, просто игнорируется BackgroundService класс. Хотя в asp core все бы работало. Помогите понять почему такое происходит.

program.cs

var host = Host.CreateDefaultBuilder()
             .ConfigureAppConfiguration((context, builder) =>
             {
                 builder.AddJsonFile("appsettings.json", optional: true);
             })
             .ConfigureServices((context, services) =>
             {
                 services.AddHttpClient()
                .AddDbContextFactory<DataContext>(opt => opt.UseMySql(
                    context.Configuration.GetConnectionString("MySQL"), Microsoft.EntityFrameworkCore.ServerVersion.Parse("5.7.30-mysql")
                    ))
                .AddLogging(configure => { configure.AddSerilog(); configure.SetMinimumLevel(LogLevel.Error | LogLevel.Warning); })

                .AddHostedService<RabbitBackgroundService>()
                .AddScoped<Form1>()
             })
             .ConfigureLogging(logging =>
             {
             })
             .Build();

var services = host.Services;
                var mainForm = services.GetRequiredService<Form1>();
                using var db = services.GetRequiredService<IDbContextFactory<DataContext>>().CreateDbContext();
                db.Database.Migrate();
                Application.Run(mainForm);

Вот сам BackGroundService:

public class RabbitBackgroundService : BackgroundService
    {
        private IServiceScopeFactory _scopeService;
        public RabbitBackgroundService( IServiceScopeFactory scopeFactory)
        {
            _scopeService = scopeFactory;
        }
        protected override Task ExecuteAsync(CancellationToken stoppingToken)
        {
            using var scope = _scopeService.CreateScope();
            var dbFactory = scope.ServiceProvider.GetService<IDbContextFactory<DataContext>>();
            using var db = dbFactory.CreateDbContext();

            var factory = new ConnectionFactory() { HostName = "...", UserName = "...", Password = "..." }; ;
            using var connection = factory.CreateConnection();
            using var channel = connection.CreateModel();

            channel.ExchangeDeclare("shop_test", "direct", true);
            channel.QueueDeclare(queue: "shop_test_buyers",
                durable: false,
                exclusive: false,
                autoDelete: false,
                arguments: null);
            channel.QueueBind("shop_test_buyers", "shop_test", "shop_test_buyers");

            var telegramConsumer = new EventingBasicConsumer(channel);
            telegramConsumer.Received += (ch, ex) =>
            {
                var body = ex.Body.ToArray();
                var str = Encoding.UTF8.GetString(body, 0, body.Length);
                var buyer = JsonSerializer.Deserialize<Buyer>(str);
                Console.WriteLine(buyer);
                //channel.BasicAck(ex.DeliveryTag, true);
                //ex.DeliveryTag = true;
            };
            channel.BasicConsume("telegram", true, telegramConsumer);
            return Task.CompletedTask;
        }
    }