public void Remove(Func<U,bool> shouldRemove)
        {
            Node<U> previous = null;
            int counter = 0;
            for (current = head; current != null; current = current.Next)
            {
                if (shouldRemove(current.Value))
                {
                    if (previous != null)
                    {
                        previous.Next = current.Next;
                    }
                    else
                    {
                        head = head.Next;
                    }
                }
                else
                {
                    previous = current;
                }
                counter++;
            }
        }