the Interlocked.Exchange uses a processor instruction that guarantees an atomic operation. The Volatile.Write does the same but it also includes a memory barrier operation. I think Microsoft added Volatile.Write on DotNet 4.5 due to support of ARM processors on Windows 8. Intel and ARM processors differs on memory operation reordering. On Intel, you have a … Read more
I’m a firm believer in that if you’re using interlocked to increment shared data, then you should use interlocked everywhere you access that shared data. Likewise, if you use insert you favorite synchronization primitive here to increment shared data, then you should use insert you favorite synchronization primitive here everywhere you access that shared data. … Read more
Worst (won’t actually work) Change the access modifier of counter to public volatile As other people have mentioned, this on its own isn’t actually safe at all. The point of volatile is that multiple threads running on multiple CPUs can and will cache data and re-order instructions. If it is not volatile, and CPU A … Read more