Yield Return with Null

Question

Is there any way to optionally return a null with a \"return yield\" driven iterator?

I would like to return a null in some cases and I don\'t think this is particul

Answer 1

If you need to things like that (or throw things like ArgumentException immediately), you need to separate your iterator into two methods:

 public IEnumerable GetItems() {
     if (something) return null;
     return GetItemsInternal();
 }

 private IEnumerable GetItemsInternal() {
     // the actual iterator with "yield return" goes here.
 }