HomeController.cs

using System.Diagnostics;
using Microsoft.AspNetCore.Mvc;
using WebApplicationHafta1.Models;

namespace WebApplicationHafta1.Controllers
{
    public class HomeController : Controller
    {
        private readonly ILogger<HomeController> _logger;

        public HomeController(ILogger<HomeController> logger)
        {
            _logger = logger;
        }

        public IActionResult Index()
        {

            var value = HttpContext.Session.GetString("UserSessionInfo");
            if (value == null)
            {
                TempData["BaþarýMesaj"]="Giriþ Yapýn Lütfen TempData";
                return RedirectToAction("Index","Login");
            }
            return View();
        }

        public IActionResult Privacy()
        {
            return View();
        }

        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public IActionResult Error()
        {
            return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
        }
    }
}