Queue interface in C#

The queue represents a first-in, first-out collection of objects. Use this when you need first-in-first-out access to items. When you add an item to the list, it's called enqueuing, and when you remove an item, it's called deque.

Let's look at an example of the Queue class.

To add an element, use Enqueue -

Queue q = new Queue();

q.Enqueue('X');
q.Enqueue('Y');
q.Enqueue('Z');

To remove an element, use Dequeue -

// remove elements
while (q.Count > 0)
Console.WriteLine(q.Dequeue());

Let’s look at an example of adding an element in a queue.

Example

Real-time demonstration

using System;
using System.Collections;

namespace Demo {
   class Program {
      static void Main(string[] args) {
         Queue q = new Queue();

         q.Enqueue('t');
         q.Enqueue('u');
         q.Enqueue('v');
         q.Enqueue('w');
         q.Enqueue('x');

         Console.WriteLine("Current queue: ");
         foreach (char c in q) Console.Write(c + " ");

         Console.WriteLine();
         Console.ReadKey();
      }
   }
}

Output

Current queue:
t u v w x

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