NanoKestrel: Running Kestrel in a console application with as minimum code as possible, i.e. avoiding all the WebHost stuff

NanoKestrel.cs

using System;
using System.Net;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Hosting.Internal;
using Microsoft.AspNetCore.Hosting.Server;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Http.Features;
using Microsoft.AspNetCore.Server.Kestrel.Core;
using Microsoft.AspNetCore.Server.Kestrel.Transport.Abstractions.Internal;
using Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;

namespace NanoKestrel
{
    class Program
    {
        static async Task Main(string[] args)
        {
            var services = new ServiceCollection();
            services.AddLogging(b =>
            {
                b.AddConsole();
                b.AddFilter("Microsoft.AspNetCore.Server.Kestrel", LogLevel.Warning);
            });

            services.Configure<KestrelServerOptions>(options =>
            {
                options.Listen(IPAddress.Any, 8080);
            });

            services.AddSingleton<IServer, KestrelServer>();
            services.AddSingleton<ITransportFactory, LibuvTransportFactory>();
            services.AddSingleton<IApplicationLifetime, ApplicationLifetime>();
            services.AddTransient<IHttpContextFactory, HttpContextFactory>();
            services.AddTransient<HostingApplication>();

            var serviceProvider = services.BuildServiceProvider();
            var server = serviceProvider.GetRequiredService<IServer>();
            var application = serviceProvider.GetRequiredService<HostingApplication>();

            await server.StartAsync(application, default).ConfigureAwait(false);
            Console.ReadLine();
        }
    }

    public class HostingApplication : IHttpApplication<HttpContext>
    {
        private readonly ILogger<HostingApplication> _logger;
        private readonly IHttpContextFactory _httpContextFactory;

        public HostingApplication(ILogger<HostingApplication> logger, IHttpContextFactory httpContextFactory)
        {
            _logger = logger;
            _httpContextFactory = httpContextFactory;
        }

        public HttpContext CreateContext(IFeatureCollection contextFeatures)
            => _httpContextFactory.Create(contextFeatures);

        public void DisposeContext(HttpContext context, Exception exception)
            => _httpContextFactory.Dispose(context);

        public async Task ProcessRequestAsync(HttpContext context)
        {
            _logger.LogInformation("{Method} {Path}", context.Request.Method, context.Request.Path);
            if (context.Request.Path.StartsWithSegments("/hello"))
            {
                await context.Response.WriteAsync("Hello World!");
            }
        }
    }
}

LibuvTransportFactory is replaced by SocketTransportFactory and running this code makes the following error:
System.TypeLoadException: Could not load type 'Microsoft.Extensions.Primitives.InplaceStringBuilder' from assembly 'Microsoft.Extensions.Primitives, Version=5.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'.

Hi,
I used this code but replacing LibuvTransportFactory by SocketTransportFactory.
Everything works fine (the server is listening properly on the specified port number, a requestion is made and accepted) except when writing the reponse.
A NullReferenceException is thrown on context.Response.WriteAsync("Hello World!");

at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpProtocol.CreateResponseHeader(Boolean appCompleted)
at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpProtocol.InitializeResponseAsync(Int32 firstWriteByteCount)
at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpProtocol.WriteAsync(ReadOnlyMemory`1 data, CancellationToken cancellationToken)
at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpResponseStream.WriteAsync(Byte[] buffer, Int32 offset, Int32 count, CancellationToken cancellationToken)
at Microsoft.AspNetCore.Http.HttpResponseWritingExtensions.WriteAsync(HttpResponse response, String text, Encoding encoding, CancellationToken cancellationToken)
at Microsoft.AspNetCore.Http.HttpResponseWritingExtensions.WriteAsync(HttpResponse response, String text, CancellationToken cancellationToken)

Any idea?