public void AddFirst(int value)
{
if (First != null)
{
First = new Node(value, null, First);
First.Next.Previous = First;
}
else
Last = First = new Node(value, null, null);
++Count;
}
public void AddLast(int value)
{
if (First != null)
{
Last = new Node(value, Last, null);
Last.Previous.Next = Last;
}
else
Last = First = new Node(value, null, null);
++Count;
}
public void Clear()
{
First = Last = null;
Count = 0;
}
public void RemoveLast()
{
if (!RemoveChecker())
return;
Last = Last.Previous;
Last.Next = null;
--Count;
}