using System;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

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

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

        //planets.Dequeue();

        // Add items for testing

        planets.Enqueue("Mercury");

        planets.Enqueue("Venus");

        planets.Enqueue("Earth");

​

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

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

        while (planets.Count > 0)

            Console.WriteLine(planets.Dequeue());

​

        //Reset the collection

        planets.Enqueue("Mercury");

        planets.Enqueue("Venus");

        planets.Enqueue("Earth");

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

        //Required namespace : using System.Linq;

        while (planets.Any())

            Console.WriteLine(planets.Dequeue());

​

​

​

    }

}