C# (CSharp) ISpendingsService примеры использования

Пример #1

 public SpendingsController(ISpendingsService _spendingsService, IEmailService email)
 {
     spendingsService = _spendingsService;
     emailService     = email;
 }

Пример #2

 public EmailServiceDecorator(IEmailService emailService, ISpendingsService service)
 {
     this.emailService = emailService;
     spendingsService  = service;
 }