Startup.cs

using BlazorServerApp.Models;
using Microsoft.AspNet.SignalR;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Components;
using Microsoft.AspNetCore.Components.Server.Circuits;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Mvc.Infrastructure;
using Microsoft.AspNetCore.SignalR;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using PrivateMessenger.Areas.Identity.Data;
using PrivateMessenger.Data;
using PrivateMessenger.Data.AutoMapper;
using PrivateMessenger.Hubs;
using PrivateMessenger.Models.Interface;
using PrivateMessenger.Models.Repository;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace PrivateMessenger
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        // 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)
        {
            services.AddRazorPages();
            services.AddServerSideBlazor();
            services.AddDbContextPool<AppDbContext>(options => options.UseSqlServer(Configuration.GetConnectionString("DbConnection")));
            services.AddDefaultIdentity<IdentityUser>()
                .AddRoles<IdentityRole>()
                .AddEntityFrameworkStores<AppDbContext>();
            services.AddScoped<UserInformation>();
            services.AddHttpContextAccessor();
            services.AddScoped<ReportsInterface,ReportsRepository>();
            services.AddScoped<UserProfileInterface, UserProfileRepository>();
            services.AddScoped<IFileUpload, FileUpload>();
            services.AddScoped<ChatMessageInterface, ChatMessageRepository>();
            services.AddScoped<ConnectionInterface, ConnectionRepository>();
            services.AddAutoMapper(typeof(ReportProfile));
            services.AddAutoMapper(typeof(UserProfile_Profile));
            //services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
            //services.AddSingleton<IActionContextAccessor, ActionContextAccessor>();
            services.AddSingleton<CircuitHandler>(new CircuitHandlerService());
            services.AddSignalR();
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env, UserManager<IdentityUser> userManager)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseExceptionHandler("/Error");
                // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
                app.UseHsts();
            }
           
            app.UseHttpsRedirection();
            app.UseStaticFiles();
            app.UseRouting();
            app.UseAuthentication();
            app.UseAuthorization();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapBlazorHub();
                endpoints.MapFallbackToPage("/_Host");

                endpoints.MapHub<ChatHub>("/chatHub");
            });
        }
    }
}