using System;

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namespace LearnCSharp {

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    public class Program {

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        public static void Main(string[] args) {

            var messageHolderOne = new AnObjectWithAMessage("One");

            var messageHolderTwo = new AnObjectWithAMessage("Two");

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            PrintCurrentMessages(messageHolderOne, messageHolderTwo);

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            messageHolderOne.HaveMyMessageMessedWith();

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            PrintCurrentMessages(messageHolderOne, messageHolderTwo);

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            messageHolderTwo.Message = "Four";

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            PrintCurrentMessages(messageHolderOne, messageHolderTwo);

            var messer = new MessWithMessages();

            messer.SetMessage("Five", messageHolderOne);

            messer.SetMessage("Six", messageHolderTwo);

            PrintCurrentMessages(messageHolderOne, messageHolderTwo);

        }

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        private static void PrintCurrentMessages(AnObjectWithAMessage messageHolderOne, AnObjectWithAMessage messageHolderTwo) {

            Console.WriteLine($"messageHolderOne: {messageHolderOne.Message}");

            Console.WriteLine($"messageHolderTwo: {messageHolderTwo.Message}");

            Console.WriteLine();

        }

    }

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    public class AnObjectWithAMessage {

        public string Message { get; set; }

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        public AnObjectWithAMessage(string message) {

            this.Message = message;

        }

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        public void HaveMyMessageMessedWith() {

            new MessWithMessages().SetMessage("Three", this);

        }

    }

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    public class MessWithMessages {

        public void SetMessage(string message, AnObjectWithAMessage messageHolder) {

            messageHolder.Message = message;

        }

    }

}