New Post: Downloading the generated file instead of saving

HttpContext.Current.Response.Clear()
        HttpContext.Current.Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
        HttpContext.Current.Response.AddHeader("content-disposition", "attachment;filename=AddingDataSet.xlsx")

        Using memoryStream As New MemoryStream()
            workbook.SaveAs(memoryStream)
            memoryStream.WriteTo(HttpContext.Current.Response.OutputStream)
            memoryStream.Close()
        End Using

        HttpContext.Current.Response.[End]()