C# (CSharp) Is_a_return примеры использования

Пример #1

 //For Deep Copy
 public Transaction(Transaction other)
 {
     transactionID = other.transactionID;
     currentDate   = other.currentDate;
     is_a_return   = other.is_a_return;
     receipt       = new List <Purchase>(other.receipt);
     payment       = other.payment;
 }

Пример #2

 public Transaction(int _transactionID, Is_a_return _is_a_return, List <Purchase> _receipt, PaymentMethod _payment)
 {
     transactionID = _transactionID;
     currentDate   = DateTime.Today;
     is_a_return   = _is_a_return;
     receipt       = new List <Purchase>(_receipt);
     payment       = _payment;
 }