asp.net Apk文件的下载

        Response.ContentType = "application/vnd.android.package-archive";
        Response.AddHeader("Content-Disposition", "attachment;filename=test.apk");
        string filename = Server.MapPath("~/test.apk");
        Response.TransmitFile(filename);
        Response.End();//这一句必须得有，让网页停止输出。否则，文件就有了网页了，