internal Enumerator(SkipLinkedList <T> list)
{
this.list = list;
version = list.version;
node = list.head;
current = default(T);
index = 0;
}
internal void Invalidate()
{
list = null;
next = null;
prev = null;
}
internal SkipLinkedListNode(SkipLinkedList <T> list, T value)
{
this.list = list;
this.item = value;
}