Align DCJS with 4.8 implementation. #57533
Merged
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Align DCJS with 4.8 implementation.
DCJS in .Net Core (and previously, going back to the days of
Silverlight) has been a wild evolution of features being cut
and added back and morphed as the features and concepts
of the associated runtimes have changed. This PR should
finally bring DCJS back inline with the current .Net 4.8
implementation.
In the process of doing so, this PR also corrects a couple of
places where DCJS was mis-stepping to cause the bug described
in #55270, which is a regression from NetFx.
Fixes #55270