.NET 8 Keyed Services Demo - An Example - One Interface - Multiple Implementations

demo.cs

public enum ReminderType
{
    Email,
    Sms,
    PushNotifications
}

//---------------------------------------------------------------------------------
// One Interface - Three Implementations
//---------------------------------------------------------------------------------
public interface IReminderService
{
    void SendReminder();
}

//---------------------------------------------------------------------------------
// Email Reminder Service
//---------------------------------------------------------------------------------
public class EmailReminderService : IReminderService
{
    private readonly ILogger<EmailReminderService> logger;

    public EmailReminderService(ILogger<EmailReminderService> logger)
    {
        this.logger = logger;
    }

    public void SendReminder()
    {
        this.logger.LogWarning("EmailReminderService - Send Reminder - Executed");
    }
}

//---------------------------------------------------------------------------------
// SMS Reminder Service
//---------------------------------------------------------------------------------
public class SmsReminderService : IReminderService
{
    private readonly ILogger<SmsReminderService> logger;

    public SmsReminderService(ILogger<SmsReminderService> logger)
    {
        this.logger = logger;
    }

    public void SendReminder()
    {
        this.logger.LogWarning("SmsReminderService - Send Reminder - Executed");
    }
}

//---------------------------------------------------------------------------------
// Push Notification Reminder Service
//---------------------------------------------------------------------------------
public class PushNotificationReminderService : IReminderService
{
    private readonly ILogger<PushNotificationReminderService> logger;

    public PushNotificationReminderService(ILogger<PushNotificationReminderService> logger)
    {
        this.logger = logger;
    }

    public void SendReminder()
    {
        this.logger.LogWarning("PushNotificationReminderService - Send Reminder - Executed");
    }
}