public IEnumerator <T> GetEnumerator()
{
DoubleNode <T> currentNode = First;
while (currentNode != null)
{
yield return(currentNode.Value);
currentNode = currentNode.Next;
}
}
public T this[int index]
{
get
{
DoubleNode <T> currentNode = First;
int i = 0;
while (currentNode != null)
{
if (index == i)
{
return(currentNode.Value);
}
currentNode = currentNode.Next;
i++;
}
return(default);
