/// <summary>
        /// Register HttpContextAccessor
        /// </summary>
        /// <param name="services">Collection of service descriptors</param>
        public static void AddHttpContextAccessor(this IServiceCollection services)
        {
            services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
        }

public virtual IActionResult GeneralCommon()
        {
            if (!_permissionService.Authorize(StandardPermissionProvider.ManageSettings))
                return AccessDeniedView();

            //prepare model
            var model = _settingModelFactory.PrepareGeneralCommonSettingsModel();

            //notify admin that CSS bundling is not allowed in virtual directories
            if (model.MinificationSettings.EnableCssBundling && HttpContext.Request.PathBase.HasValue)
                _notificationService.WarningNotification(_localizationService.GetResource("Admin.Configuration.Settings.GeneralCommon.EnableCssBundling.Warning"));

            return View(model);
        }

public Task Invoke(Microsoft.AspNetCore.Http.HttpContext context, IWebHelper webHelper, IWorkContext workContext)
        {
            //set culture
            SetWorkingCulture(webHelper, workContext);

            //call the next middleware in the request pipeline
            return _next(context);
        }

namespace OrchardCore.Modules
{
    public class DefaultOrchardHelper : IOrchardHelper
    {
        public DefaultOrchardHelper(IHttpContextAccessor httpContextAccessor)
        {
            HttpContext = httpContextAccessor.HttpContext;
        }

        public HttpContext HttpContext { get; set; }
    }
}