using System;

using static System.Console;

using System.Collections.Generic;

using System.Text;

​

class Program {

    static void Main() {

        var p1 = new Post(DateTime.Now, "Travelling to New Zealand", "I'm going to visit this wonderful country!", 12);

        p1.AddComment(new Comment("Have a nice trip!"));

        p1.AddComment(new Comment("Wow that's awesome!"));

        var p2 = new Post(DateTime.Now, "Good night guys",  "See you tomorrow", 5);

        p2.AddComment(new Comment("Good night"));

        p2.AddComment(new Comment("May the force be with you"));

        WriteLine(p1);

        WriteLine(p2);

    }

}

​

class Comment {

    public string Text { get; set; }

    public Comment() {}

    public Comment(string text) => Text = text;

}

class Post {

    public DateTime Moment { get; set; }

    public string Title { get; set; }

    public string Content { get; set; }

    public int Likes { get; set; }

    public List<Comment> Comments { get; set; } = new List<Comment>();

    public Post() {}

    public Post(DateTime moment, string title, string content, int likes) {

        Moment = moment;

        Title = title;

        Content = content;

        Likes = likes;

    }

    public void AddComment(Comment comment) => Comments.Add(comment);

    public void RemoveComment(Comment comment) => Comments.Remove(comment);

    public override string ToString() {

        var sb = new StringBuilder();

        sb.AppendLine(Title);

        sb.Append(Likes);

        sb.Append(" Likes - ");

        sb.AppendLine(Moment.ToString("dd/MM/yyyy HH:mm:ss"));

        sb.AppendLine(Content);

        sb.AppendLine("Comments:");

        foreach (Comment c in Comments) sb.AppendLine(c.Text);

        return sb.ToString();

    }

}