LinkedListNode.cs

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namespace System.Collections.Generic;
 
public sealed class LinkedListNode<T>
{
    internal LinkedList<T> list;
 
    internal LinkedListNode<T> next;
 
    internal LinkedListNode<T> prev;
 
    internal T item;
 
    public LinkedList<T>? List => list;
 
    public LinkedListNode<T>? Next
    {
        get
        {
            if (next != null && next != list.head)
            {
                return next;
            }
            return null;
        }
    }
 
    public LinkedListNode<T>? Previous
    {
        get
        {
            if (prev != null && this != list.head)
            {
                return prev;
            }
            return null;
        }
    }
 
    public T Value
    {
        get
        {
            return item;
        }
        set
        {
            item = value;
        }
    }
 
    public ref T ValueRef => ref item;
 
    public LinkedListNode(T value)
    {
        item = value;
    }
 
    internal LinkedListNode(LinkedList<T> list, T value)
    {
        this.list = list;
        item = value;
    }
 
    internal void Invalidate()
    {
        list = null;
        next = null;
        prev = null;
    }
}