# Exercise: File I/O

Exercise: File I/O: Exercise: File I/O.

Updated: November 3, 2026

1. [Exercise: File I/O](https://www.ask-codey.com/lessons/exercise-file-i-o) (Journeyman): Read a school's grades from a CSV file with mistakes in it, log every line you can't read with your own LogService, write an honor roll, and add new students to the end of a file.

Source: https://www.ask-codey.com/courses/csharp-full-stack-bootcamp/topics/exercise-file-i-o