Example of working with ConcurrentQueue<T>

ConcurrentQueueExample.cs

using System;
using System.Collections.Concurrent;

namespace ConcurrentQueueExample
{
    class Program
    {

        static void Main(string[] args)
        {
            ConcurrentQueueAPI queueApi = new ConcurrentQueueAPI();

            Console.WriteLine("Putting items in the queue.");
            
            queueApi.AddItem("Hello");
            queueApi.AddItem("World");

            Console.WriteLine("\n\nIs the queue empty?");
            Console.WriteLine(queueApi.NoItemsAvailable());

            Console.WriteLine("\n\nHow many items do we have?");
            Console.WriteLine(queueApi.ItemCount());

            Console.WriteLine("\n\nLet's see the items");
            while (!queueApi.NoItemsAvailable())
            {
                string tempString = queueApi.GetItem();
                if (tempString != string.Empty)
                {
                    Console.WriteLine(tempString);
                }
            }

            Console.WriteLine("\n\nIs the queue empty?");
            Console.WriteLine(queueApi.NoItemsAvailable());
            
            Console.WriteLine("\n\nPress Enter to quite");
            Console.ReadLine();
        }

        /*
         * Output of the application:
         * Putting items in the queue.
           Adding item Hello
           Adding item World
           
           
           Is the queue empty?
           False
           
           
           How many items do we have?
           2
           
           
           Let's see the items
           Hello
           World
           
           
           Is the queue empty?
           True
           
           
           Press Enter to quite
           
         */
    }

    class ConcurrentQueueAPI
    {
        private readonly ConcurrentQueue<string> _queue;

        public ConcurrentQueueAPI()
        {
            _queue = new ConcurrentQueue<string>();
        }

        public void AddItem(string item)
        {
            Console.WriteLine($"Adding item {item}");
            _queue.Enqueue(item);
        }

        public string GetItem()
        {
            if (_queue.TryDequeue(out string result))
            {
                return result;
            }

            return string.Empty;
        }

        public bool NoItemsAvailable()
        {
            return _queue.IsEmpty;
        }

        public int ItemCount()
        {
            return _queue.Count;
        }
    }
}