private static void Main(string[] args)
        {
            try
            {
                Console.WriteLine("Hello World!");
                Console.ReadKey();

                Console.WriteLine("------Select Operation--------");
                KullaniciManager kullaniciManager = new KullaniciManager();
                foreach (DAL.Models.Kullanici VARIABLE in kullaniciManager.GetAll().ToList())
                {
                    Console.WriteLine(VARIABLE.ad);
                }

                Console.ReadKey();
                Console.WriteLine("------Insert Operation--------");
                Kullanici k = new Kullanici()
                {
                    ad                   = "Kübra",
                    email                = "*****@*****.**",
                    adminMi              = false,
                    aktifMi              = true,
                    onayKodu             = "12586",
                    sifre                = "7854123985",
                    soyad                = "KAPLAN",
                    telefon              = "547856965",
                    universitePersonelMi = false
                };
                var PkId = kullaniciManager.Insert(k);
                k.KullaniciId = Convert.ToInt32(PkId);

                Console.ReadKey();
                Console.WriteLine("------Get By ID Operation--------");
                var user = kullaniciManager.GetById(PkId);
                Console.WriteLine($"ID={user.KullaniciId}\tAD={user.ad}\tSOYAD={user.soyad}");

                Console.ReadKey();
                Console.WriteLine("------Delete Operation--------");
                kullaniciManager.Delete(PkId);


                Console.ReadKey();
                Console.WriteLine("------ Again Select Operation--------");
                kullaniciManager = new KullaniciManager();
                foreach (DAL.Models.Kullanici VARIABLE in kullaniciManager.GetAll().ToList())
                {
                    Console.WriteLine(VARIABLE.ad);
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message + "\n" + e.InnerException?.Message);
                throw;
            }

            Console.ReadKey();
        }