How to best implement the CodeLens function of C#?

I am currently trying to rewrite the trigger logic of IntraLineAdornmentManagerBase. During this process, I encountered a problem: how to redraw when clicking the code folding button, I did not find the relevant events and judgment methods.

Hello,

Do you have a new simple sample project of your own that you could send over that shows the flashing behavior you are seeing?  That would help us see what you are seeing and then we could talk about options on improving the refreshing logic.  Please send that to our support address, reference this thread in your email, and remove the bin/obj folders from the .zip you send so it doesn't get spam blocked.

For the followup question, do you mean you are trying to detect when some code is collapsed?  The editor view's CollapsedRegionManager has a RegionsChanged event that fires in that scenario.  Or if you mean something else, please explain in more detail.  Thanks!

Thank you for providing the sample project. We were able to observe the flicker you were describing. The issue is that when the Hyperlink is first added as an adornment, the text is empty. Later, after the task completes to get the reference count, the Hyperlink text is updated. This change in text is what is causing the flicker you described.

Adornments are constantly being removed and added as you modify the text. To avoid the flicker, you will need to limit changes to the Hyperlink text.

A suggested way to accomplish this is to cache data about the reference count for a declaration so that, when you add the adornment with the Hyperlink, you can initialize the Hyperlink text with the previously cached reference count. This will ensure the adornment is added with the most up-to-date information and will only be redrawn if the reference count changes.