Volatile vs. Interlocked vs. lock

Question

Let\'s say that a class has a public int counter field that is accessed by multiple threads. This int is only incremented or decremented.

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Answer 1

I second Jon Skeet's answer and want to add the following links for everyone who want to know more about "volatile" and Interlocked:

Atomicity, volatility and immutability are different, part one - (Eric Lippert's Fabulous Adventures In Coding)

Atomicity, volatility and immutability are different, part two

Atomicity, volatility and immutability are different, part three

Sayonara Volatile - (Wayback Machine snapshot of Joe Duffy's Weblog as it appeared in 2012)