using System;

using System.Collections;

class QueueDemo

{

    public static void Main()

    {

        //Create an instance of Queue

        Queue Q = new Queue();

        //Add elements to the Queue using Enqueue() Method

        Q.Enqueue("Prasad");

        Q.Enqueue("Giri");

        Q.Enqueue("Ravi");

        //Dequeue() removes and returns the object at the begining of the queue

        Console.WriteLine(Q.Dequeue());

        //Count determines the number of elements contained in the Queue

        //Count will be 2 as we removed the first object from the queue

        Console.WriteLine("Count = " + Q.Count);

        //Peek() method returns the object at the begining of the queue without

        //removing from the queue

        Console.WriteLine(Q.Peek());

        //The count will still be 2 as the peek() method will not remove the object

        //from the queue

        Console.WriteLine("Count = " + Q.Count);

        //Remove all the items from the Queue using Clear() method

        Q.Clear();

    }

}