How to use Queue class in C#?

Queue represents a first-in, first out collection of object. It is used when you need a first-in, first-out access to items. When you add an item to the list, it is called enqueue, and when you remove an item, it is called deque.

The following table lists some of the commonly used methods of the Queue class −

Let us see an example of the Queue class −

Example

 Live Demo

using System;
using System.Collections;

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

         q.Enqueue('X');
         q.Enqueue('Y');
         q.Enqueue('Z');
   
         Console.WriteLine("Current queue: ");
         foreach (char c in q) Console.Write(c + " ");

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

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

Output

Current queue:
X Y Z
Current queue:
X Y Z A