Using LINQ in Unity

I was wondering if there are any known issues with using LINQ in Unity. I use a good bit for some editor scripts, but was unsure about using it during game runtime.

I haven’t seen a post/article with a definitive answer either way, and was wondering if someone know for sure ( in terms of speed/performance, compatibility issues etc)

This might be a dumb question, but I would like to avoid surprises.

Thanks in advance.

There are a couple of problems with Linq in UnityScript (the 2 parameter version of ToDictionary emits code that fails at runtime for instance), but generally no - it works fine and I use it everywhere. Everything works in C#

Becareful not to make something very slow by having too many loops and iterations in what looks like short code.