https://learn.microsoft.com/ko-kr/dotnet/api/system.timers.timer.synchronizingobject?view=netframework-4.8.1&viewFallbackFrom=net-10.0
Timer.SynchronizingObject Property (System.Timers) | Microsoft Learn
Gets or sets the object used to marshal event-handler calls that are issued when an interval has elapsed.
property systemtimermicrosoftlearn