using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var planets = new Stack<Planet>();

        planets.Push(new Planet() { Id = 1, Name = "Mercury" });

        planets.Push(new Planet() { Id = 2, Name = "Venus" });

        planets.Push(new Planet() { Id = 3, Name = "Earth" });

​

        foreach (var planet in planets)

              Console.WriteLine($"{planet.Id}, {planet.Name}");

    }

}

​

class Planet

{

  public int Id { get; set; }

  public string Name { get; set; }

}