Unity Example 6-2

MessageService

public interface IMessageService
{
    void SendMessage(string to, string msg);
}

public class EmailService : IMessageService
{
    public void SendMessage(string to, string msg)
    {
        Console.WriteLine(" 透過 EmailService 發送郵件給 {0}。", to);
    }
}

public class SmsService : IMessageService
{
    public void SendMessage(string to, string msg)
    {
        Console.WriteLine(" 透過 SmsService 發送簡訊給 {0}。", to);
    }
}