How can I do that my WinForms C# app save changes even if the app closes or opens again?

Question

I mean, that for example,you do changes, let's say you write something in a textbox, then, my app is closed, and you open it again, I need that the text that you write still there.

Answer 1

you can save that text in some txt file...

Answer 2

I think, you are looking for this.

https://www.dotnetperls.com/settings

https://www.youtube.com/watch?v=RITSf841Tbo

Or do you want to it yourself ?