public void RemoveMenu(DateTime date, string nameProd, int calorie, int weight, int typeEat, int userid) { using (CalorieCalculatorDBEntities1 db = new CalorieCalculatorDBEntities1()) { Products prod = db.Products.FirstOrDefault(x => x.NameProduct == nameProd); int idProd = prod.ProductsId; UserMenu menu = db.UserMenu.Where(x => x.Date == date) .Where(x => x.ProductsId == idProd) .Where(x => x.UserId == IdUser.Id) .Where(x => x.WeightProduct == weight) .Where(x => x.Calorie == calorie) .Where(x => x.TypeEatingId == typeEat) .FirstOrDefault(); db.UserMenu.Remove(menu); db.SaveChanges(); } }