New Post: Do I need to dispose all the instances (Task, Trigger, Action, etc) which implemented interface “IDisposable”?

on the Example Home page:
https://taskscheduler.codeplex.com/wikipage?title=Examples&referringTitle=Documentation

I see that only the TaskService need to be disposed.
But others classes, for example: Task, TaskDefinition, Trigger, Action, etc. They implemented interface “IDisposable” too.
Do I need to call method “IDisposable .Dispose” (or user “useing”) to release resource?

Thank you very much for your help!