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Almost — C# has a cool feature whereby you can do pointer arithmetic if you pin the objects in question first, so the GC won't collect or move them. (The language statically enforces this by forbidding you from taking the address of a value until you pin it.)

That's cool; I think another way of doing it is to allow programs to request a sandbox where the GC doesn't go so they can do all of the pointer-arithmeticking they want as long as all their pointers fall within the sandbox by the time they're written through or dereferenced.

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