IdentityServer4 as a SAML IdP using ComponentSpace - Startup class

Startup.cs

using IdentityServer4;
using IdentityServer4.Models;
using IdentityServer4.Services;
using IdentityServer4.Stores;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using System;

namespace TestIdentityServer4
{
    public class Startup
    {
        private readonly IConfiguration _config;

        public Startup(IConfiguration config)
        {
            _config = config;
        }

        // 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.AddMvc();

            services.AddIdentityServer()
                .AddDeveloperSigningCredential()
                .AddInMemoryIdentityResources(Config.GetIdentityResources())
                .AddInMemoryApiResources(Config.GetApiResources())
                .AddInMemoryClients(Config.GetClients())
                .AddTestUsers(Config.GetUsers());

            // Add SAML SSO services.
            services.AddSaml(_config.GetSection("SAML"));

            // Add SAML middleware services.
            services.AddSamlMiddleware();
        }

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

            app.UseIdentityServer();

            // Use SAML middleware.
            app.UseSaml();

            // Specify the display name and return URL for logout.
            app.Use(async (context, next) =>
            {
                if (context.Request.Path.Value.Equals("/Account/Logout", StringComparison.OrdinalIgnoreCase) &&
                    string.IsNullOrEmpty(context.Request.Query["logoutId"]))
                {
                    var identityServerInteractionService = context.RequestServices.GetRequiredService<IIdentityServerInteractionService>();
                    var logoutMessageStore = context.RequestServices.GetRequiredService<IMessageStore<LogoutMessage>>();

                    var logoutMessage = new Message<LogoutMessage>(new LogoutMessage
                    {
                        ClientName = "SAML Service Provider",
                        PostLogoutRedirectUri = "/SAML/SingleLogoutServiceCompletion"
                    },
                    DateTime.UtcNow);

                    var logoutId = await logoutMessageStore.WriteAsync(logoutMessage);

                    context.Request.QueryString = context.Request.QueryString.Add("logoutId", logoutId);
                }

                await next();
            });

            app.UseStaticFiles();
            app.UseMvcWithDefaultRoute();
        }
    }
}