using System;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

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

        strQ.Enqueue("H");

        strQ.Enqueue("e");

        strQ.Enqueue("l");

        strQ.Enqueue("l");

        strQ.Enqueue("o");

​

        Console.WriteLine("Total elements: {0}", strQ.Count); //prints 5

​

        while (strQ.Count > 0)

            Console.WriteLine(strQ.Dequeue()); //prints Hello

​

        Console.WriteLine("Total elements: {0}", strQ.Count); //prints 0

    }

}