public YourClass(ISmtpClient smtpClient, IMailMessageComposer mailMessageComposer)
 {
     _smtpClient          = smtpClient;
     _mailMessageComposer = mailMessageComposer;
 }
 public EmailService(ISmtpClient smtpClient, IMailMessageComposer mailMessageComposer)
 {
     _smtpClient          = smtpClient;
     _mailMessageComposer = mailMessageComposer;
 }