Transient Code Annotations During Debugging: Feature or Plugin?

Hi everyone,

I’m currently using JetBrains Rider and I’m curious if there is an existing feature or plugin that allows for adding transient annotations on code during a debugging session without modifying the actual codebase.

For example, I’d like to attach a temporary note (e.g., “this value is null here”) to a specific line. This note should display as a popup or tooltip during debugging and be easily removable.

Has anyone used such a feature or plugin? If so, could you share your experiences or how it works? If not, do you think developing such a solution would be practical and beneficial?

Thanks in advance for your insights!