Excel spreadsheets are widely used for storing and managing data, but sometimes it’s necessary to convert them into a different file format, such as CSV. CSV (Comma-Separated Values) is a popular file format that’s supported by a wide range of applications and platforms, making it a convenient choice for data sharing and transfer. We are going to show you the details on how to use C# to convert Excel XLS/XLSX spreadsheets into CSV format, so that you can access your data more easily and share it more widely.