static void Main(string[] args) { Logger.Log(Logger.Level.Debug, "Program started"); do { OneOrder(); Console.WriteLine("One more client on call? YES or NO"); Questions.inputYesNo = Console.ReadLine(); if (!(Questions.inputYesNo.Equals("YES", StringComparison.OrdinalIgnoreCase) || Questions.inputYesNo.Equals("NO", StringComparison.OrdinalIgnoreCase))) { do { Console.WriteLine("Wrong answer. One more try. Type YES or NO."); Questions.inputYesNo = Console.ReadLine(); } while (!(Questions.inputYesNo.Equals("YES", StringComparison.OrdinalIgnoreCase) || Questions.inputYesNo.Equals("NO", StringComparison.OrdinalIgnoreCase))); } }while ((Questions.inputYesNo.Equals("YES", StringComparison.OrdinalIgnoreCase))); Console.Read(); void OneOrder() { Logger.Log(Logger.Level.Debug, "Making order"); Messages.Greetings(); List <Customer> customer = new List <Customer>(); customer.Add(new Customer() { Name = Console.ReadLine() }); TimeOfDay.GreetingsTimeOfDay(customer[customer.Count - 1]); Json.Serializing(Json.settings, @"menu.JSON"); List <Food> deserializedFood = new List <Food>(); deserializedFood = Json.Deserealizing(Json.settings, @"menu.JSON"); Food.ShowMenu(deserializedFood); List <FoodInCart> foodInCarts = new List <FoodInCart>(); Questions.ChoosingFromMenu(deserializedFood, foodInCarts); FoodInCart.ShowCheckSummary(foodInCarts); MailSender.SendEmailAsync(foodInCarts).GetAwaiter(); Console.WriteLine("Input your delivery adress"); customer[customer.Count - 1].Adress = Console.ReadLine(); customer[customer.Count - 1].Email = MailSender.email; customer[customer.Count - 1].OrderDate = DateTime.Now.ToLocalTime(); customer[customer.Count - 1].Order = FoodInCart.CheckSummaryToString(foodInCarts); Json.SerializingCustomer(Json.settings, "Orders.Json", customer[customer.Count - 1]); } }