using System;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        Stack<string> planets = new Stack<string>();

        //If Stack is empty and you try to invoke Pop(), will generate exception. Uncomment below code to test.

        //planets.Pop();

        // Add items for testing

        planets.Push("Mercury");

        planets.Push("Venus");

        planets.Push("Earth");

​

        //Pop() : Remove item from the collection.

        Console.WriteLine("-----Loop 1-----"); 

        while (planets.Count > 0)

            Console.WriteLine(planets.Pop());

​

        //Reset the collection

        planets.Push("Mercury");

        planets.Push("Venus");

        planets.Push("Earth");

        Console.WriteLine("-----Loop 2-----"); 

        //Required namespace : using System.Linq;

        while (planets.Any())

            Console.WriteLine(planets.Pop());

​

​

​

    }

}