Does Interlocked.CompareExchange use a memory barrier?

Question

I\'m reading Joe Duffy\'s post about Volatile reads and writes, and timeliness, and i\'m trying to understand something about the last code sample in the post:

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Answer 1

According to ECMA-335 (section I.12.6.5):

5. Explicit atomic operations. The class library provides a variety of atomic operations in the System.Threading.Interlocked class. These operations (e.g., Increment, Decrement, Exchange, and CompareExchange) perform implicit acquire/release operations.

So, these operations follow principle of least astonishment.