Edit data in file via DataGridView?

Question

C++ / C#

Hello.
Can you please tell me how to implement editing the data that is in the file through the DataGridView?
I really wanted to see at least code sketches. Or a link to such an implementation, because I could have missed something in the English-language resources.
Thanks in advance.

Answer 1

Read the file into memory, edit the contents in memory, when necessary - merge back into the file