static void Main(string[] args) { ProductManager producManager = new ProductManager(new InMemoryDal()); foreach (var p in producManager.GetAll()) { Console.WriteLine(p.BrandId + " " + p.Id + " " + p.Description); } Console.WriteLine("*******"); producManager.Add(new Product { BrandId = 5, ColorId = 7, DailyPrice = 5000, Description = "Ultra Lüks", Id = 8, ModelYear = 2021 }); foreach (var p in producManager.GetAll()) { Console.WriteLine(p.BrandId + " " + p.Id + " " + p.Description); } Console.WriteLine("*******"); producManager.Delete(new Product { Id = 3 }); foreach (var p in producManager.GetAll()) { Console.WriteLine(p.BrandId + " " + p.Id + " " + p.Description); } Console.WriteLine("*******"); producManager.Update(new Product { Id = 8, Description = "değişti" }); foreach (var p in producManager.GetAll()) { Console.WriteLine(p.BrandId + " " + p.Id + " " + p.Description); } Console.WriteLine("*******"); foreach (var p in producManager.GetByBrandId(2)) { Console.WriteLine(p.BrandId + " " + p.Id + " " + p.Description); } }