See details in https://github.com/dotnet/corefx/pull/32729#issuecomment-428789737 and the `Timer_ManyDifferentSerialSingleDueTimes_AllFireWithinAllowedRange` test in corefx (https://github.com/dotnet/corefx/blob/61d06d8b7ba8e16d22714a6a173d61efb6289fd5/src/System.Threading.Timer/tests/TimerFiringTests.cs#L252).
See details in dotnet/corefx#32729 (comment) and the
Timer_ManyDifferentSerialSingleDueTimes_AllFireWithinAllowedRangetest in corefx (https://github.com/dotnet/corefx/blob/61d06d8b7ba8e16d22714a6a173d61efb6289fd5/src/System.Threading.Timer/tests/TimerFiringTests.cs#L252).