C# Queue<T> class is used to Enqueue and Dequeue elements. It uses the concept of Queue that arranges elements in FIFO (First In First Out) order. It can have duplicate elements. It is found in System.Collections.Generic namespace.
C# Queue<T> example
Let's see an example of generic Queue<T> class that stores elements using Enqueue method, removes elements using Dequeue method and iterates elements using for-each loop.
Example
using System;
using System.Collections.Generic;
public class QueueExample
{
public static void Main(string[] args)
{
Queue<string> names = new Queue<string>();
names.Enqueue("Sonoo");
names.Enqueue("Peter");
names.Enqueue("James");
names.Enqueue("Ratan");
names.Enqueue("Irfan");
foreach (string name in names)
{
Console.WriteLine(name);
}
Console.WriteLine("Peek element: "+names.Peek());
Console.WriteLine("Dequeue: "+ names.Dequeue());
Console.WriteLine("After Dequeue, Peek element: " + names.Peek());
}
}
Output:
Output
Sonoo
Peter
James
Ratan
Irfan
Peek element: Sonoo
Dequeue: Sonoo
After Dequeue, Peek element: Peter