Slightly pedantic point: In the case of C#, not observing an exception (i.e. catching or thrown by another thread could kill the whole program before .NET 4.5.

Slightly pedantic point: In the case of C#, not observing an exception (i.e. catching or thrown by another thread could kill the whole program before .NET 4.5. But this was pretty easy to guard around in various, even easy (if sloppy) ways.