asp.net – 为什么FireFox在下载文件时不包含.xml扩展名？

注意：这适用于IE 6(没有尝试基于WebKit的浏览器或Opera)

private void GenerateXmlAttachment(string xmlInStringFormat,string fileName)
    {
    // Where fileName = "someFile.xml"
        HttpResponse response = HttpContext.Current.Response;
        response.Clear();
        response.Charset = string.Empty;
        response.ContentEncoding = Encoding.Default;

    response.AddHeader("Content-Disposition","attachment;filename=" + fileName);
        response.AddHeader("Content-Length",xmlInStringFormat.Length.ToString());
    response.ContentType = "text/xml";          

    response.Write(xmlInStringFormat);
        response.Flush();
        response.End();

    }

想法有人吗？