DI for SignalR in ASP.NET.Core

Startup.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.DependencyInjection;
using SignalR.Lab.Web.Hubs;
using SignalR.Lab.Web.Services;


namespace SignalR.Lab.Web
{
    public class Startup
    {
        // This method gets called by the runtime. Use this method to add services to the container.
        // For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
        public void ConfigureServices(IServiceCollection services)
        {
            // DI SignalR
            services.AddSignalR();

            // ...
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            // ....
            
            // register middleware for SignalR
            app.UseSignalR(routes => 
            {
                // the url most start with lower letter
                routes.MapHub<EventHub>("/eventHub");
            });

           
        }
    }
}