IEnumerable foreach, do something different for the last element

Question

I have an IEnumerable. I want to do one thing for each item of the collection, except the last item, to which I want to do something else. How can I code this neatly? I

Answer 1

I wouldn't really recommend it, but I guess you could do something like this...

object m_item = notPartOfListFlag = new object();
foreach(var item in enumerator){
   if(m_item != notPartOfListFlag)
   {
      //do stuff to m_item;
   }
   m_item = item;
}
//do stuff to last item aka m_item;

But I would try to use some kind of collection that exposes the position of the items in the list, then use

if(collection.IndexOf(item) == collection.Count-1) do stuff