Dear Hikalkan: I have been blocked by this question for over 5days, I ased so many people, but none can give me an answer,I can hardly breath by this quetion anymore. The question is: In your 1.6.0Version, you started to use xxxManager in core layer, such as EditionManager, it offers CRUD functions, and there is no IRepository anymore. I am so confused right now, If I have a new class named 'BeltDevice', How could I wirte BeltDeviceManager? I read the AbpEditionManager, it was so complex, I have no idea how to start. If you have 5minues please help me, thank you so much.