Something like csv reader and ef core allow you to write a POCO to act as a schema for the data. Then when you are reading or writing, you do it using your POCO instead of manually doing to conversion back to whatever format it is originally.

Is there a library that is specifically for this? I want to create a Google sheets library where it follows a similar pattern, users write a POCO for a spreadsheet row and they get the rows back in the POCO. No more Lists of Lists of strings.