HomeMonitor/Hub/Service/Startup.cs

using Hub.Service.Hubs;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.DependencyInjection;

namespace Hub.Service
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);

            services.AddSignalR().AddJsonProtocol(options => { options.PayloadSerializerSettings.ContractResolver = new Newtonsoft.Json.Serialization.DefaultContractResolver(); });
        }

        public void Configure(IApplicationBuilder applicationBuilder, IHostingEnvironment environment)
        {
            if (environment.IsDevelopment())
            {
                applicationBuilder.UseDeveloperExceptionPage();
            }

            applicationBuilder.UseSignalR(routes => { routes.MapHub<WeatherHub>("/weatherHub"); });

            applicationBuilder.UseMvc();
        }
    }
}