public static SingletonOrder GetInstance() { if (Instance == null) { Instance = new SingletonOrder(); } return(Instance); }
public PaymentDetails(string cardNumber, string cardName, string securityNumber, string expiryMonth, string expiryYear) { CardNumber = cardNumber; CardName = cardName; SecurityNumber = securityNumber; ExpiryMonth = expiryMonth; ExpiryYear = expiryYear; _singletonOrder = SingletonOrder.GetInstance(); }