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Created attachment 23762 [details]
Workbook showing difference in time subtraction precision
Attached is a workbook that illustrates different precisions for `SecondsSinceReferenceDate - SecondsSinceReferenceDate` vs `(DateTime - DateTime).TotalSeconds`
It actually seems to me that it's `TotalSeconds` that's truncating, but one way or the other, you would expect the result to be the same, but they are not.
Switching status to "Confirmed" since I can recreate discrepancy between the two precisions.
I'm not sure if this is the same bug, but:
var a = NSDate.Now
a.SecondsSinceReferenceDate - ((NSDate) (DateTime) a).SecondsSinceReferenceDate
PR merged in master https://github.com/xamarin/xamarin-macios/commit/523e95182e9abb3b8ba77215dbe0105555c04e14
Includes unit test