Hello!

I'm trying to save a Generic List to Excel and decided to use Infragistics.Excel.  However on the Save method I get the following error: "The file name to which to save the file has an extension which doesn't match the current format of the workbook." I'm trying to save with .xlsx extension, with .xls it works just fine. Any help with this is greatly appreciated.

I'm running Infragistics version 10.2. Which I assumed one of the more recent once, does is not support Microsoft Excel 2010?

Below is the simplified version of my code: 

        private string SaveToExcel (List<TestClass> testClass)

        {

            Workbook workbook = new Workbook();

            Worksheet worksheet = workbook.Worksheets.Add("Invoice");

            PropertyInfo[] properties = typeof(TestClass).GetProperties();

            int row = 0;

            int column = 0;

            foreach(PropertyInfo property in properties)

            {

                worksheet.Rows[row].Cells[column].Value = property.Name;

                column++;

            }

            string path = "C:\\TEST\\";

            string fileName = path + "test.xlsx";

            workbook.Save(fileName);

            return fileName;

        }

 Thanks!