public ProcessingService(IEmailSender emailSender, IMessageInfoRetriever messageInfoRetriever)
 {
     _emailSender = emailSender;
     _messageInfoRetriever = messageInfoRetriever;
 }
 public ProcessingService(IEmailSender emailSender, IMessageInfoRetriever messageInfoRetriever)
 {
     _emailSender          = emailSender;
     _messageInfoRetriever = messageInfoRetriever;
 }
 public static string SendMessage(this IEmailSender emailSender, IMessageInfoRetriever messageInfoRetriever)
 {
     string messageBody = messageInfoRetriever.GetMessageBody();
     emailSender.SendEmail(messageBody);
     return "Send Email With Body: " + messageBody;
 }