​

using System.Collections.Generic;

using System.Threading.Tasks;

using System.Threading;

using System;

using System.Collections.Concurrent;

using System.Linq;

   public  class Program

    {  

      public static void Main(string[] args) 

{

​

​

List<int> ints = new List<int>();

ints.Add(1);

ints.Add(2);

ConcurrentQueue<int> coll = new ConcurrentQueue<int>(ints);

​

coll.Enqueue(3);

coll.Enqueue(4);

coll.Enqueue(5);

coll.Enqueue(6);

          //.........Retriving all items from Queue

          foreach (var col in coll){

    Console.WriteLine(col);

}

​

//........Retrive or Remove single item.......

​

int item;

bool isSuccessful = coll.TryPeek(out item); //.......passing item as reference type using 'out ' keyword

​

Console.WriteLine(isSuccessful);

​

Console.WriteLine(item);

​

//......Dequeing items from queue

​

isSuccessful = coll.TryDequeue(out item);  

Console.WriteLine(isSuccessful); //Returns True

Console.WriteLine(item);    //Return "1"

​

Console.WriteLine();

​

//..........Counting items.......

​

int count = coll.Count();

​

//.........Copying ConcurrentQueue to Array......

​

int[] array = coll.ToArray();

foreach(int i in array)

{

    Console.Write(i +" ,");

}

​

Console.WriteLine();

​

}

​

    }

​