How to Convert Excel to CSV in C#. For more information, please follow link: https://kb.groupdocs.com/conversion/net/how-to-convert-excel-to-csv-in-csharp/

How to Convert Excel to CSV in C#.cs

using System;
using GroupDocs.Conversion.Options.Convert;

namespace ConvertExcelToCsvInCSharp
{
    class Program
    {
        public static void Main(string[] args) // Main function to convert Excel to CSV using C#
        {
            // Remove the watermark in output CSV document by adding license
            string licensePath = "GroupDocs.Conversion.lic";
            GroupDocs.Conversion.License lic = new GroupDocs.Conversion.License();
            lic.SetLicense(licensePath);
            
            // Load the source Excel file for conversion to CSV
            var converter = new GroupDocs.Conversion.Converter("sample.xlsx");
                
            // Set the starting sheet number and consecutive sheet count
            var convertOptions = new SpreadsheetConvertOptions 
            { 
                Format = GroupDocs.Conversion.FileTypes.SpreadsheetFileType.Csv,
                PageNumber = 1,
                PagesCount = 1
            };

            // Convert and save the Excel in CSV format
            converter.Convert("converted.csv", convertOptions);

            Console.WriteLine("Done");
        }
    }
}