استفاده صحیح از قواعد شی‌گرایی [Polymorphism]

 public enum MessageType
    {
        Success,
        Failure
    }
    public class Message
    {
        public string MessageText { get; set; }
        public MessageType Type { get; set; }
    }
    class Program
    {
        static void Main(string[] args)
        {
            Message msg = new Message(){MessageText="Success",Type =MessageType.Success }
            ShowMessage(msg);
        }

        private static void ShowMessage(Message msg)
        {
            switch (msg.Type)
            {
                case MessageType.Success:
                    ShowGreenMessage();
                    break;
                case MessageType.Failure:
                    ShowRedMessage();
                    break;
                default:
                    break;
            }
        }

        private static void ShowGreenMessage()
        {
            throw new NotImplementedException();
        }

        private static void ShowRedMessage()
        {
            throw new NotImplementedException();
        }
    } 

 class Program
    {
        static void Main(string[] args)
        {
            MessageRefactor msg = new SuccessMessage() { MessageText="Success"};
            msg.ShowMessage();
        }

    }

    public abstract class MessageRefactor
    {
        public string MessageText { get; set; }
        public abstract void ShowMessage();
    }

    public class SuccessMessage : MessageRefactor
    {

        public override void ShowMessage()
        {
            ShowGreenMessage();
        }

        private void ShowGreenMessage()
        {
            throw new NotImplementedException();
        }
    }
    public class FailureMessage : MessageRefactor
    {

        public override void ShowMessage()
        {
            ShowRedMessage();
        }

        private void ShowRedMessage()
        {
            throw new NotImplementedException();
        }
    }