.NET (Core and Framework)

HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("http://www.amazon.com/gp/help/customer/display.html");
            //HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("https://www.healthnet.com");
            request.CookieContainer = new CookieContainer();
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();


            Console.WriteLine("All headers:");
            for (int i = 0; i < response.Headers.Count; ++i )
            {
                Console.WriteLine("{0}: \n {1}", response.Headers.Keys[i], response.Headers[i]);
            }

            Console.WriteLine("");
            Console.WriteLine("All cookies:");
            foreach (Cookie cookie in response.Cookies)
            {
                Console.WriteLine("{0}: {1}", cookie.Name, cookie.Value);
            }

All headers:
x-amz-id-1:
 0P09T2EKQ1NZCTH6JTK8
x-amz-id-2:
 goS/ANFrq3GUOuMXYT3zBq5SfqNM5CfI
Vary:
 Accept-Encoding,User-Agent
Content-Type:
 text/html; charset=ISO-8859-1
Date:
 Wed, 11 Nov 2009 09:43:28 GMT
P3P:
 policyref="http://www.amazon.com/w3c/p3p.xml",CP="AMZN "
Set-Cookie:
 session-id-time=1258531200l; path=/; domain=.amazon.com; expires=Wed Nov 18 08:
00:00 2009 GMT,session-id=180-8758643-6589604; path=/; domain=.amazon.com; expir
es=Wed Nov 18 08:00:00 2009 GMT
Server:
 Server
Transfer-Encoding:
 chunked

All cookies: