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Re:System.Linq.Parallel Is Now Open Source by Someone on Wednesday December 03, 2014 @06:48AM (#8693178)
It is a magic marker http://en.wikipedia.org/wiki/Magic_number_%28programming%29#....

Both its 16-bit parts have odd values, it is an illegal address (at least on the systems it was introduced for), and it is recognizable in hex dumps. That makes it a good value for uninitialized memory.

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