如何从ASP.Net Core5 (Razor)的中间件中获取页面模型的类型？

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc.ApplicationModels;
using Microsoft.AspNetCore.Mvc.Razor;
using Microsoft.AspNetCore.Routing;
using Microsoft.Extensions.DependencyInjection;
using System;
using System.Reflection;

namespace YourNamespace
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvc().AddRazorPagesOptions(options =>
            {
                options.Conventions.Add(new PageModelTypeConvention());
            });
        }

        public void Configure(IApplicationBuilder app)
        {
            app.UseRouting();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapGet("/", async context =>
                {
                    var pageModelType = context.GetRouteData().Values["page"]?.ToString();
                    var pageModel = GetPageModelType(pageModelType);

                    await context.Response.WriteAsync($"Page Model Type: {pageModel}");
                });
            });
        }

        private Type GetPageModelType(string pageModelType)
        {
            var assembly = Assembly.GetExecutingAssembly();
            var razorPagesFeature = new ViewsFeature();
            var pagePath = $"/Pages/{pageModelType}.cshtml";

            var razorViewEngine = new RazorViewEngine(
                new DefaultPageFactoryProvider(razorPagesFeature),
                new DefaultViewLocationCache(razorPagesFeature));

            var viewEngineResult = razorViewEngine.GetView(null, pagePath, false);
            var view = viewEngineResult.View;

            var pageTypeInfo = view.GetType().GetTypeInfo();
            var pageModelTypeInfo = pageTypeInfo.GetProperty("ModelTypeInfo").GetValue(view) as TypeInfo;
            var pageModelType = pageModelTypeInfo.AsType();

            return pageModelType;
        }
    }

    public class PageModelTypeConvention : IPageRouteModelConvention
    {
        public void Apply(PageRouteModel model)
        {
            var pageModelType = model.ViewEnginePath.Replace("/Pages/", "").Replace(".cshtml", "");
            model.RouteValues["page"] = pageModelType;
        }
    }
}