using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Text;
public class MainClass
{
public static void Main()
{
LinkedList<int> list = new LinkedList<int>();
list.AddFirst(10);
list.AddLast(15);
list.AddLast(3);
list.AddLast(99);
list.AddBefore(list.Last, 25);
LinkedListNode<int> node = list.First;
while (node != null)
{
Console.WriteLine(node.Value);
node = node.Next;
}
}
}
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