<p>I am 90% sure I saw this answer on stackoverflow before, in fact I had never seen the "int?" syntax before seeing it here, but no matter how I search I can't find the previous post, and it's driving me crazy.</p>

<p>It's possible that I've been eating the funny mushrooms by accident, but if I'm not, can someone please point out the previous post if they can find it or re-explain it?  My stackoverflow search-fu is apparently too low....</p>

int? is shorthand for
```
Nullable<int>
```
.
This
may be the post you were looking for.