Fri Dec 15 2017 19:46:37 UTC
If there's anything to blame, it's the lack of unit tests.
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ID Product Comp Assignee Status Resolution Summary Changed
31885 Class Li mscorlib alkpli RESO DUPL Directory.EnumerateFiles returns incorrect result when searchPattern includes subdir 2016-11-29
One bug found.

as

File a new bug in the "mscorlib" component of the "Class Libraries" product