Exporting XLSX file with Epplus generates file with error - excel

Question

Problem
I'm trying to send a List to an Excel file by using the LoadFromCollection method.
After I generate an XLSX file, it does not open but if I change the extension to XLS, it appears like this.
ExcelFileError
Code
[HttpGet]
[Route("GetExcel")]
public async Task<HttpResponse> GetExcel()
{
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.ClearContent();
HttpContext.Current.Response.ClearHeaders();
HttpContext.Current.Response.Buffer = true;
HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.NoCache);
var stream = new MemoryStream();
using (var excelPackage = new ExcelPackage())
{
ExcelWorksheet ws = excelPackage.Workbook.Worksheets.Add("SoftwareVersao");
var result = await _versaoAppService.Selecionar();
ws.Cells["A1"].LoadFromCollection(result);
ws.Cells.AutoFitColumns();
excelPackage.SaveAs(stream);
}
HttpContext.Current.Response.BinaryWrite(stream.ToArray());
HttpContext.Current.Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
HttpContext.Current.Response.AddHeader("content-disposition", "attachment;filename=" + "SoftwareVersao.xlsx");
HttpContext.Current.Response.Flush();
HttpContext.Current.ApplicationInstance.CompleteRequest();
return HttpContext.Current.Response;
}
This code generates a corrupted XLSX file if I change the lines below it generates the above image.
HttpContext.Current.Response.ContentType = "application/vnd.ms-excel"
HttpContext.Current.Response.AddHeader("content-disposition", "attachment;filename=" + "SoftwareVersao.xls");
Attempts
I've made several attempts.
I used HttpResponseMessage instead of HttpResponse
I used a blank template in creating the file
I changed the enconding
I used several code snippets
What am I doing wrong? Is there something I forgot to implement?
Update
I found this question and now could generate the XLSX file, but I'm having the same problem that the author of the question, where Excel have to repair the file.
WebApi using EF EPPlus returning gibberish in exce