问没有“Microsoft.AspNetCore.Hosting.Server.IServer”类型的服务在.Net核心3.1控制台应用程序中注册错误

EN

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.AspNetCore.SignalR;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

namespace core_selfhost
{
    public class Startup
    {
        public IConfiguration Configuration { get; }
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddSignalR();
            //services.AddControllers();
            //services.AddMvcCore();
            // return services.BuildServiceProvider();

        }
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            app.UseRouting();
            //app.UseHttpsRedirection();
            //app.UseCors();         
            app.UseEndpoints(endpoints =>
            {
                //endpoints.MapControllers();
                endpoints.MapHub<MyHub>("/signalr/myHub");
            });
        }
    
        public class MyHub : Hub
        {
            public void Send(string name, string message)
            {

                Clients.All.SendAsync(name, message);
            }
        }
    }
}

 public static void Main(string[] args)
 {
     // CreateHostBuilder(args).Build().Run();
     Thread webThread = new Thread(webSocket);
     webThread.Start();
 }
 public static void webSocket()
 {
     IWebHost host = null;
     try
     {
         var url = "http://localhost:8080";
         Console.WriteLine("In WebSocket");

         var hostBuilder = new WebHostBuilder().UseUrls(url)
             .UseIISIntegration()
             .UseKestrel()
             .UseStartup<Startup>()
             .Build();

         hostBuilder.Run();

         Console.WriteLine("Server running on {0}", url);
         Console.ReadLine();
     }
     catch (Exception exc)
     {
         Console.WriteLine("In Websocket exception");
         Console.WriteLine(exc.Message);
     }
 }