Extension for reversing the linked list.

Reverse_LinkedList_Extension.cs

/// <summary>
/// Creates new <see cref="LinkedList{T}"/> with reversed nodes.
/// </summary>
/// <typeparam name="T"></typeparam>
public static LinkedList<T> Reverse<T>(this LinkedList<T> originalList)
{
    var reversedList = new LinkedList<T>();
    var last = originalList.Last;
    reversedList.AddFirst(last.Value);
    while ((last = last.Previous) is not null)
        reversedList.AddLast(last.Value);
    return reversedList;
}