C#

what is CAT programing ? can anybody help me?

I tried to the HttpResponseHeader with iwebbrowser2,webview,webbrowser in c#,c++.
But I didn't get the httpresponseheader with those.
I want follow result...

HTTP/1.1 200 OK
Server: nginx
Date: Wed, 11 Sep 2019 05:15:13 GMT
Content-Type: text/html; charset=utf-8
Content-Length: 53780
Connection: keep-alive
X-Frame-Options: SAMEORIGIN
Set-Cookie: SESSION=860f2fff966caecf422fa095e52444df; path=/; secure; HttpOnly
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate
Pragma: no-cache
Set-Cookie: ua=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; Max-Age=0; path=/
Set-Cookie: lng=en; expires=Fri, 11-Oct-2019 05:15:13 GMT; Max-Age=2592000; path=/
Set-Cookie: flaglng=en; expires=Fri, 11-Oct-2019 05:15:13 GMT; Max-Age=2592000; path=/
Set-Cookie: _glhf=1568196689; expires=Wed, 11-Sep-2019 06:15:13 GMT; Max-Age=3600; path=/
Set-Cookie: disallow_sport=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; Max-Age=0; path=/
Vary: Accept-Encoding
Content-Encoding: gzip
Strict-Transport-Security: max-age=15768000

Help! Help! Help!
Thank you! ^**^