Downloading excel file

hi

i have some code to generate a excel workbook with a sheet filled with some informations.

Instead of just save the excel file locally on the server, i want the user to save in on theres owns computer.

My code to save the file:

Dim fileName As String = Server.MapPath("~/temp/" & Guid.NewGuid().ToString() & ".xlsx")
            Console.WriteLine(fileName)
            _excel.ActiveWorkbook.SaveAs(fileName)


            Response.Clear()
            Response.ContentType = "application/vnd.ms-excel"
            Response.AddHeader("content-disposition", "attachment;filename=Konto.xslx")
            Response.WriteFile(fileName)
            Response.End()

        Catch ex As Exception
            ClientScript.RegisterStartupScript(Me.GetType(), "myalert", "alert('Exporting Failed " & ex.Message & "');", True)
        Finally
            wBook.Close()
            wSheet = Nothing
            wBook = Nothing
            _excel.Quit()
            _excel = Nothing

the code failed with this error:

Path\temp\c8ccf73c-76af-4b22-930e-6ca013856de8.xlsx' because it is being used by another process.

If i try to call wBook.Close after SaveAs method, then i got a new error. "Thread was aborted"..