public int Recount()
{
int length = 0;
LinkListItem <T> pointer = _first;
while (pointer != null)
{
length++;
pointer = pointer.Next;
}
return(length);
}
public T Pop()
{
var listItem = _first;
if (listItem == null)
{
return(default(T));
}
_first = _first.Next;
if (_first != null)
{
_first.Prev = null;
}
_length--;
return(listItem.Element);
}
public int Add(T element)
{
if (_length == 0)
{
_last = _first = new LinkListItem <T> {
Element = element, Prev = null, Next = null
};
}
else
{
_last = _last.Next = new LinkListItem <T> {
Element = element, Prev = _last, Next = null
};
}
return(++_length);
}