MongoDB Time Processing issues

When MongoDB is saved to the database, the default is UTC time, and when the database is saved, there is an interval between the current time and 8 hours. At the time of reading, need to convert back again, more troublesome. In fact, MONGO itself has provided the corresponding processing method, that is, in the entity class to add a property. Specific as follows:
[Bsondatetimeoptions (Kind = datetimekind.local)]
Public DateTime opertime {get; set;}

Final results

Perfect deal!

From for notes (Wiz)

MongoDB Time Processing issues