How to Convert XLSX to DOCX using C#. For more information, please follow link: https://kb.conholdate.com/total/net/how-to-convert-xlsx-to-docx-using-csharp

how-to-convert-xlsx-to-docx-using-csharp.cs

using GroupDocs.Conversion;

namespace ConvertXLSXtoDOCXusingCSharp
{
    class Program
    {
        public static void Main(string[] args)
        {
            // Set the license to avoid the limitations of the Conversion library
            License license = new License();
            license.SetLicense(@"GroupDocs.Conversion.lic");

            // Import the XLSX document 
            var converter = new GroupDocs.Conversion.Converter("input.xlsx");

            // Get the conversion options for DOCX output 
            var docxConversionOptions = converter.GetPossibleConversions()["docx"]
                .ConvertOptions;

            // Save the DOCX to disk
            converter.Convert("ConvertXLSXtoPDFusingCSharp.docx", docxConversionOptions);
        }
    }
}