How to correctly implement the "remember" button in the program?

Question

C++ / C#

I am creating a small, but my own project, in which the site of my institution is parsed: it searches for the names of groups in the table and should display the schedule and time opposite the couples. I thought about the button "remember the group" so that each time I did not have to choose from the list. I am faced with this for the first time and would like to ask you what implementations exist today?
Thank you.

Answer 1

Use the standard application settings storage mechanism:
https://habr.com/post/271483/
https://stackoverflow.com/questions/453161/best-pr...

Answer 2

Save to DBMS or just a file.
Added later:
In the Windows registry, a field of type REG_SZ.