Thread safe DateTime update using Interlocked.*

Question

Can I use an Interlocked.* synchronization method to update a DateTime variable?

I wish to maintain a last-touch time stamp in memory. Multiple http threads will update

Answer 1

Yes, you can do this. Your biggest problem may be that DateTime.Ticks only has a resolution of ~20 ms. So it doesn't really matter if you keep a DateTime last or a long ticks variable. But since there is no overload of Exchange for DateTime, you need to use long.