Learning ASP.NET Core MVC Programming

E-mail and SMS services

If you want to add e-mail and SMS services to your application's authentication capabilities, you can do so by creating the interfaces and classes shown here: 

public interface IEmailSender {         Task SendEmailAsync(string email, string subject, string message)   }   public interface ISmsSender     {         Task SendSmsAsync(string number, string message);     } public class AuthMessageSender : IEmailSender, ISmsSender     {         public Task SendEmailAsync(string email, string subject, string message)         {             // We can plug in our email service here to send an email.             return Task.FromResult(0);         }         public Task SendSmsAsync(string number, string message)         {             ...