public IEnumerator <T> GetEnumerator()
{
current = head;
do
{
if (current != null)
{
yield return(current.Data);
current = current.Next;
}
}while (current != head);
}
public DoublyNode <T> Current(T data)
{
if (head == null)
{
return(null);
}
current = head;
do
{
if (current.Data.Equals(data))
{
return(current);
}
current = current.Next;
}while (current != head);
return(null);
}
public void Add(DoublyNode <T> node)
{
if (head == null)
{
head = node;
head.Previous = node;
head.Next = node;
}
else
{
node.Previous = head.Previous;
node.Next = head;
head.Previous.Next = node;
head.Previous = node;
}
count++;
}
public void Clear()
{
head = null;
count = 0;
}
public DoublyNode <T> MovePrevious()
{
current = current.Previous;
return(current);
}
public DoublyNode <T> MoveNext()
{
current = current.Next;
return(current);
}