C# (CSharp) IPaymentPortal примеры использования

Пример #1

 public SocialNetwork(IPaymentPortal paymentPortal, CredentialManager credentialManager)
 {
     _paymentPortal         = paymentPortal ?? throw new ArgumentNullException(nameof(paymentPortal));
     this.credentialManager = credentialManager ?? throw new ArgumentNullException(nameof(credentialManager));
 }

Пример #2

 public SocialNetwork(IPaymentPortal paymentPortal)
 {
     _paymentPortal = paymentPortal ?? throw new ArgumentNullException(nameof(paymentPortal));
 }