Is it possible to generate .xlsb excel file format using NPOI in C#?

Question

We tried with the below code and cannot able to open in Microsoft Excel. Is this the right way to generate the .xlsb file using NPOI? Please advise

using (var exportdata = new MemoryStream())
                {
                    var name = output.xlsb;
                    System.Web.HttpContext.Current.Response.Clear();
                    workbook.Write(exportdata);                    
                    System.Web.HttpContext.Current.Response.ContentType = "application / vnd.ms - excel.sheet.binary.macroEnabled.12";
                    System.Web.HttpContext.Current.Response.AddHeader("Content-Disposition", string.Format("attachment;filename=" + name + ";"));
                    System.Web.HttpContext.Current.Response.BinaryWrite(exportdata.ToArray());
                    System.Web.HttpContext.Current.Response.Flush();
                    System.Web.HttpContext.Current.Response.End();
                }