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.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using MongoDBSampleCRUD.Services;
using Microsoft.AspNetCore.HttpsPolicy;
using MongoDBSampleCRUD.Services.Contracts;
using MongoDBSampleCRUD.Services.Concrete;
using MongoDBSampleCRUD.Services.DI;
using MongoDBSampleCRUD.DbSettings.Concrete;
using MongoDBSampleCRUD.DbSettings.Contracts;

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

        public IConfiguration Configuration { get; }
        private ServiceRegistry svcRegistry = new ServiceRegistry();

        // This method gets called by the runtime. Use this method to add services to the container.
        //public void ConfigureServices(IServiceCollection services)
        //{
        //    services.AddControllers();
        //}

        public void ConfigureServices(IServiceCollection services)
        {
            services.Configure<BookstoreDatabaseSettings>(
                Configuration.GetSection(nameof(BookstoreDatabaseSettings)));

            services.AddSingleton<IBookstoreDatabaseSettings>(sp =>
                sp.GetRequiredService<IOptions<BookstoreDatabaseSettings>>().Value);

            svcRegistry.ConfigureServiceRegistries(services);
            services.AddControllers(); // .AddNewtonsoftJson(options => options.UseMemberCasing());
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseRouting();

            app.UseAuthorization();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllers();
            });
        }
    }
}