public IEnumerable <T> GetEnumeratorByDelegate(MyDelegate <T> del)
{
DoublyNode <T> current = (DoublyNode <T>)Head;
while (current != null)
{
var validate = del?.Invoke(current.Item);
if (validate == true)
{
yield return(current.Item);
}
current = (DoublyNode <T>)current.NextElement;
}
}
protected override Node <T> CreateNode(T item)
{
DoublyNode <T> node = new DoublyNode <T>(item);
return(node);
}