public void AddFirst(DoublyLinkedListNode <T> node)
{
DoublyLinkedListNode <T> temp = Head;
Head = node;
Head.Next = temp;
if (Count == 0)
{
Tail = Head;
}
else
{
temp.Previous = Head;
}
Count++;
}
public void RemoveLast()
{
// 1 <-> 2<-> 3<->4
// 1
if (Count != 0)
{
if (Count != 1)
{
Tail = Tail.Previous;
Tail.Next = null;
}
else
{
Head = null;
Tail = null;
}
Count--;
}
}
public void RemoveFirst()
{
// 1 <-> 2<-> 3<->4
// 1
if (Count != 0)
{
Head = Head.Next;
if (Count != 1)
{
Head.Previous = null;
}
else
{
Tail = null;
}
Count--;
}
}
