.net核心中的中间件不工作，让我来讨论一下

public void Configure(IApplicationBuilder app)
{

    var request = new Request("api/menu/create", Method.POST);
    request.AddParameter("currentApplicationId", 1, ParameterType.QueryString);


    app.UseHttpsRedirection();
    app.UseStaticFiles();
    app.UseCookiePolicy();
    // UPDATE :  Code above prevented from being able to step into below?  

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

    app.Use((context, next) =>
    {
        var cultureQuery = context.Request.Query["culture"];
        if (!string.IsNullOrWhiteSpace(cultureQuery))
        {
            var culture = new CultureInfo(cultureQuery);
            CultureInfo.CurrentCulture = culture;
            CultureInfo.CurrentUICulture = culture;
        }

        // Call the next delegate/middleware in the pipeline
        return next();
    });

    app.Run(async (context) =>
    {
        await context.Response.WriteAsync(
        $"Hello {CultureInfo.CurrentCulture.DisplayName}");
    });

}