public void Old()
{
    List<> list = new List<>()   ;
    foreach(sceneItem item in scene)
    {
        list.add(item.drawinfo);
    }

    ...

    foreach(item i in list)
    {
        i.Draw(spriteBatch);
    }
}

public void New()
{
   //myPoolArray already existed
   int poolSize;
   foreach(sceneItem item in scene)
   {
        item.SetInfo(myArray[poolSize++]);
   }

   for(int i = 0; i < poolSize; i++)
   {
       myArray[i].Draw(...);
   }

   //note myArray should always be big enough

}public void Old()
{

}