C# LinkedList

by Online Tutorials Library July 14, 2022

C# LinkedList<T>

C# LinkedList<T> class uses the concept of linked list. It allows us to insert and delete elements fastly. It can have duplicate elements. It is found in System.Collections.Generic namespace.

It allows us to add and remove element at before or last index.

C# LinkedList<T> example

Let’s see an example of generic LinkedList<T> class that stores elements using AddLast() and AddFirst() methods and iterates elements using for-each loop.

 using System; using System.Collections.Generic;  public class LinkedListExample {     public static void Main(string[] args)     {         // Create a list of strings         var names = new LinkedList();         names.AddLast(“tutor aspire”);         names.AddLast(“Ankit”);         names.AddLast(“Peter”);         names.AddLast(“Irfan”);         names.AddFirst(“John”);//added to first index          // Iterate list element using foreach loop         foreach (var name in names)         {             Console.WriteLine(name);         }     } } 

Output:

John tutor aspire Ankit Peter Irfan

Note: Unlike List, you cannot create LinkedList using Collection initializer.

C# LinkedList<T> example 2

Let’s see another example of generic LinkedList<T> class that stores elements before and after specific node. To get the specific node, we are calling Find() method.

 using System; using System.Collections.Generic;  public class LinkedListExample {     public static void Main(string[] args)     {         // Create a list of strings         var names = new LinkedList();         names.AddLast(“tutor”);         names.AddLast(“Ankit”);         names.AddLast(“Peter”);         names.AddLast(“Irfan”);                  //insert new element before “Peter”         LinkedListNode node=names.Find(“Peter”);         names.AddBefore(node, “John”);         names.AddAfter(node, “Lucy”);          // Iterate list element using foreach loop         foreach (var name in names)         {             Console.WriteLine(name);         }     } } 

Output:

tutor Ankit John Peter Lucy Irfan

As you can see in the above output “John” and “Lucy” are added before and after “Peter”.

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Note: Unlike List, you cannot create LinkedList using Collection initializer.

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