Thread: can this code be optimised? to be faster ?

Code:

  public int Add(object value)        {


            object[] tmp = new object[_items.Length + 1];




            for (int i = 0; i < _items.Length; i++)
            {
                tmp[i] = _items[i];
            }




            tmp[tmp.Length - 1] = value;




            _items = tmp;
            return tmp.Length - 1;
        }