Accept-Ranges doesn't appear in asp.net response -

Accept-Ranges doesn't appear in asp.net response -

i wrote simple asp.net page simulates file download response. added next lines adjust response:

response.addheader("etag", "\"" + _encodeddata + "\""); response.addheader("last-modified", lastupdatetiemstamp); response.addheader("accept-ranges", "bytes"); //set contenttype response.contenttype = "application/octet-stream"; //add file name , attachment, //which forcefulness open/cancel/save dialog show, header response.addheader("content-disposition", "attachment;filename=" + ditem.filename); //add file size response header response.addheader("content-length", (endbyte - startbytes).tostring()); response.addheader("connection", "keep-alive");

my problem accept-ranges doesn't apear in response header, when alter accept-ranges accept-ranges1 header(accept-ranges1) receive response header.

this problem occurs when debugging project in visual studio. when on iis ok

asp.net