Check If a Node Is in a Linked List in C#

Use the Contains() method to check whether a node is a LinkedList or not.

Here is our LinkedList.

string [] students = {"Beth","Jennifer","Amy","Vera"};
LinkedList<string> list = new LinkedList<string>(students);

Now, to check whether the node “Amy” is in the list or not, we will use the Contains() method as shown below −

list.Contains("Amy")

The method will return a Boolean value i.e. True in this case.

Let us see the complete code.

Example

 Live Demo

using System;
using System.Collections.Generic;
class Demo {
   static void Main() {
      string [] students = {"Beth","Jennifer","Amy","Vera"};
      LinkedList<string> list = new LinkedList<string>(students);
      foreach (var stu in list) {
         Console.WriteLine(stu);
      }
      // adding a node at the end
      var newNode = list.AddLast("Emma");
      // adding a new node after the node added above
      list.AddAfter(newNode, "Matt");
      Console.WriteLine("LinkedList after adding new nodes...");
      foreach (var stu in list) {
         Console.WriteLine(stu);
      }
      Console.WriteLine("Is Student Amy (node) in the list?: "+list.Contains("Amy"));
      Console.WriteLine("Is Student Anne (node) in the list?: "+list.Contains("Anne"));
   }
}

Output

Beth
Jennifer
Amy
Vera
LinkedList after adding new nodes...
Beth
Jennifer
Amy
Vera
Emma
Matt
Is Student Amy (node) in the list?: True
Is Student Anne (node) in the list?: False