public void RemoveLast()
{
if (last != null)
{
bool bSetCur = (current == last);
if (last.Previous == null)
{
last = null;
first = null;
current = null;
}
else
{
last.Previous.Next = null;
last = last.Previous;
if (bSetCur)
{
current = null;
}
}
}
}
public void RemoveFirst()
{
if (first != null)
{
bool bSetCur = (current == first);
if (first.Next == null)
{
last = null;
first = null;
current = null;
}
else
{
first.Next.Previous = null;
first = first.Next;
if (bSetCur)
{
current = null;
}
}
}
}
public void Remove(object v)
{
if (first != null)
{
LinkedListItem item = first;
while (item != null)
{
if (v == item.Value)
{
LinkedListItem prev = item.Previous;
if (prev == null)
{
//item is the first
RemoveFirst();
}
else
{
LinkedListItem next = item.Next;
if (next == null)
{
RemoveLast();
}
else
{
prev.Next = next;
next.Previous = prev;
}
}
break;
}
else
{
item = item.Next;
}
}
}
}
public void Clear()
{
current = null;
first = null;
last = null;
}