How to convert an XLS file to CSV Let’s say you have the file clients.xlsx and you need it converted to clients.csv to be then uploaded as a client list in your new CRM tool.

Install IronXL Excel Library from NuGet or the DLL download Use the WorkBook.Load method to read any XLS, XLSX or CSV document. Get Cell values using intuitive syntax: sheet[“A11 ...

What makes a CSV file unique is the way its content is organized. Here's what you need to know about CSV files and how to use them.