asp.net core session无法获取问题解决方案

在使用asp.net core 的session存取验证码时，发现后面获取不到,参考别的把services.Configure<CookiePolicyOptions>注释掉就可以了，cnm microsoft。microsoft经常变，无语！！！

https://blog.csdn.net/yenange/article/details/80954802

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.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.EntityFrameworkCore;
using LJCMS.Models;
using UEditor.Core;
using Microsoft.Extensions.FileProviders;
using System.IO;

namespace LJCMS
{
    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.
        public void ConfigureServices(IServiceCollection services)
        {
            

            //services.Configure<CookiePolicyOptions>(options =>
            //{
            //    // This lambda determines whether user consent for non-essential cookies is needed for a given request.
            //    options.CheckConsentNeeded = context => false;
            //    options.MinimumSameSitePolicy = SameSiteMode.None;
            //});

            // 使用ueditor
            services.AddUEditorService();

            //使用asp.net core 会话功能
            services.AddDistributedMemoryCache();

            services.AddSession(options =>
            {
                // Set a short timeout for easy testing.
                options.IdleTimeout = TimeSpan.FromSeconds(100);
                options.Cookie.HttpOnly = true;
                // Make the session cookie essential
                options.Cookie.IsEssential = true;
            });

            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);

            services.AddDbContext<LJCMSContext>(options =>
                    options.UseSqlite(Configuration.GetConnectionString("LJCMSContext2")));
        }

        // 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();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
            }
            
            app.UseStaticFiles(new StaticFileOptions
            {
                FileProvider = new PhysicalFileProvider(Path.Combine(Directory.GetCurrentDirectory(), "upload")),
                RequestPath = "/upload",
                OnPrepareResponse = ctx =>
                {
                    ctx.Context.Response.Headers.Append("Cache-Control", "public,max-age=36000");
                }
            });
            app.UseStaticFiles();
            app.UseSession();
            //app.UseCookiePolicy();
            app.UseAuthentication();
            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "areas",
                    template: "{area:exists}/{controller=Home}/{action=Index}/{id?}"
                  );

                routes.MapRoute(
                    name: "default",
                    template: "{controller=Home}/{action=Index}/{id?}"
                    );
                
            });
        }
    }
}