using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CSharpCollectionQueue
{
    class Program
    {
        static void Main(string[] args)
        {
            //Initialize a Queue object
            Queue intQueue = new Queue();

            // Populate the Queue
            //Insert in the queue the following values: 
            //10, 20, 30 ,40 and 50
            for (int i = 0; i < 5; i++)
            {
                intQueue.Enqueue((i + 1) * 10);
            }

            Console.WriteLine("Here are the items in the Queue: ");

            //Print each member of the Queue
            foreach (int i in intQueue)
            {
                Console.Write("{0} ", i.ToString());
            }

            // Displays the first member of the Queue without removing it
            //The method Peek get the first element.
            //If we call "Peek" the second time we will get the second element (20)
            Console.Write("\nThe value of the first member is: {0} \n", intQueue.Peek().ToString());

            // Removes the first item from the Queue and displays the remaining items
            intQueue.Dequeue();
            Console.Write("The first item has now been removed. \nNow the remaining members are: ");

            //Print each member of the Queue
            foreach (int i in intQueue)
            {
                Console.Write("{0} ", i.ToString());
            }
            System.Console.ReadKey();
        }
    }
}