hello!
anyone know a way to convert such file into CSV? i can’t find a good resource where learn to how do it
Anyone with MS Excel can do that for you (save as Excel). Failing that, you should be able to get Libre Office. I believe that app can read MS Excel documents and save them as csv
Open file in any spreadsheet application, and go “File .> Save As”.
You can also import them into Google Sheets download them that way.
Solved by using NPOI library.
Pure example of over engineering 