	Name	Description
	Accept	Content-Types that are acceptable - Accept: text/plain
	AcceptCharset	Character sets that are acceptable Accept-Charset: utf-8
	AcceptDatetime	Acceptable version in time Accept-Datetime: Thu, 31 May 2007 20:35:00 GMT
	AcceptEncoding	Acceptable encodings. See HTTP compression. Accept-Encoding: gzip, deflate
	AcceptLanguage	Acceptable languages for response Accept-Language: en-US
	AcceptRanges	What partial content range types this server supports Accept-Ranges: bytes
	Age	The age the object has been in a proxy cache in seconds. Age: 12
	Allow	Valid actions for a specified resource. To be used for a 405 Method not allowed. Allow: GET, HEAD
	Authorization	Authentication credentials for HTTP authentication Authorization: Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ==
	CacheControl	Used to specify directives that MUST be obeyed by all caching mechanisms along the request/response chain Cache-Control: no-cache
	Connection	Request: What type of connection the user-agent would prefer Connection: keep-alive Respose: Options that are desired for the connection[19]. Connection: close
	ContentDisposition	An opportunity to raise a "File Download" dialogue box for a known MIME type with binary format or suggest a filename for dynamic content. Quotes are necessary with special characters. Content-Disposition: attachment; filename="fname.ext"
	ContentEncoding	The type of encoding used on the data. See HTTP compression. Content-Encoding: gzip
	ContentLanguage	The language the content is in Content-Language: da
	ContentLength	The length of the request/response body in octets (8-bit bytes)
	ContentLocation	An alternate location for the returned data. Content-Location: /index.htm
	ContentMD5	A Base64-encoded binary MD5 sum of the content of the request/response body Content-MD5: Q2hlY2sgSW50ZWdyaXR5IQ==
	ContentRange	Where in a full body message this partial message belongs. Content-Range: bytes 21010-47021/47022
	ContentType	The MIME type of the body of the request/response (used with POST and PUT requests) Content-Type: application/x-www-form-urlencoded
	Cookie	An HTTP cookie previously sent by the server with Set-Cookie (below) Cookie: $Version=1; Skin=new;
	Date	The date and time that the request/response was sent Date: Tue, 15 Nov 1994 08:12:31 GMT
	ETag	An identifier for a specific version of a resource, often a message digest. ETag: "737060cd8c284d8af7ad3082f209582d"
	Expect	Indicates that particular server behaviors are required by the client Expect: 100-continue
	Expires	Gives the date/time after which the response is considered stale. Expires: Thu, 01 Dec 1994 16:00:00 GMT
	From	The email address of the user making the request From: user@example.com
	Host	The domain name of the server (for virtual hosting), mandatory since HTTP/1.1. Although domain name are specified as case-insensitive[7][8], it is not specified whether the contents of the Host field should be interpreted in a case-insensitive manner[9] and in practice some implementations of virtual hosting interpret the contents of the Host field in a case-sensitive manner.[citation needed] Host: en.wikipedia.org
	IfMatch	Only perform the action if the client supplied entity matches the same entity on the server. This is mainly for methods like PUT to only update a resource if it has not been modified since the user last updated it. If-Match: "737060cd8c284d8af7ad3082f209582d"
	IfModifiedSince	Allows a 304 Not Modified to be returned if content is unchanged. If-Modified-Since: Sat, 29 Oct 1994 19:43:31 GMT
	IfNoneMatch	Allows a 304 Not Modified to be returned if content is unchanged, see HTTP ETag If-None-Match: "737060cd8c284d8af7ad3082f209582d"
	IfRange	If the entity is unchanged, send me the part(s) that I am missing; otherwise, send me the entire new entity. If-Range: "737060cd8c284d8af7ad3082f209582d"
	IfUnmodifiedSince	Only send the response if the entity has not been modified since a specific time. If-Unmodified-Since: Sat, 29 Oct 1994 19:43:31 GMT
	LastModified	The last modified date for the requested object, in RFC 2822 format. Last-Modified: Tue, 15 Nov 1994 12:45:26 GMT
	Link	Used to express a typed relationship with another resource, where the relation type is defined by RFC 5988 Link: </feed>; rel="alternate"[23]
	Location	Used in redirection, or when a new resource has been created. Location: http://www.w3.org/pub/WWW/People.html
	MaxForwards	Limit the number of times the message can be forwarded through proxies or gateways. Max-Forwards: 10
	P3P	This header is supposed to set P3P policy, in the form of P3P:CP="your_compact_policy". However, P3P did not take off,[24] most browsers have never fully implemented it, a lot of websites set this header with fake policy text, that was enough to fool browsers the existence of P3P policy and grant permissions for third party cookies. P3P: CP="This is not a P3P policy!
	Pragma	Implementation-specific headers that may have various effects anywhere along the request-response chain. Pragma: no-cache
	ProxyAuthenticate	Request authentication to access the proxy. Proxy-Authenticate: Basic
	ProxyAuthorization	Authorization credentials for connecting to a proxy. Proxy-Authorization: Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ==
	Range	Request only part of an entity. Bytes are numbered from 0. Range: bytes=500-999
	Referer	This is the address of the previous web page from which a link to the currently requested page was followed. (The word “referrer” is misspelled in the RFC as well as in most implementations.) Referer: http://en.wikipedia.org/wiki/Main_Page
	Refresh	Used in redirection, or when a new resource has been created. This refresh redirects after 5 seconds. This is a proprietary, non-standard header extension introduced by Netscape and supported by most web browsers. Refresh: 5; url=http://www.w3.org/pub/WWW/People.html
	RetryAfter	If an entity is temporarily unavailable, this instructs the client to try again after a specified period of time (seconds). Retry-After: 120
	Server	A name for the server. Server: Apache/2.4.1 (Unix)
	SetCookie	An HTTP cookie Set-Cookie: UserID=JohnDoe; Max-Age=3600; Version=1
	StrictTransportSecurity	A HSTS Policy informing the HTTP client how long to cache the HTTPS only policy and whether this applies to subdomains. Strict-Transport-Security: max-age=16070400; includeSubDomains
	TE	The transfer encodings the user agent is willing to accept: the same values as for the response header Transfer-Encoding can be used, plus the "trailers" value (related to the "chunked" transfer method) to notify the server it expects to receive additional headers (the trailers) after the last, zero-sized, chunk. TE: trailers, deflate
	Trailer	The Trailer general field value indicates that the given set of header fields is present in the trailer of a message encoded with chunked transfer-coding. Trailer: Max-Forwards
	TransferEncoding	The form of encoding used to safely transfer the entity to the user. Currently defined methods are: chunked, compress, deflate, gzip, identity. Transfer-Encoding: chunked
	Upgrade	Ask the server to upgrade to another protocol.
	UserAgent	The user agent string of the user agent. User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20100101 Firefox/12.0
	Vary	Tells downstream proxies how to match future request headers to decide whether the cached response can be used rather than requesting a fresh one from the origin server. Vary: *
	Via	Request: Informs the server of proxies through which the request was sent. Via: 1.0 fred, 1.1 nowhere.com (Apache/1.1) Response: Informs the client of proxies through which the response was sent. Via: 1.0 fred, 1.1 nowhere.com (Apache/1.1)
	Warning	A general warning about possible problems with the entity body. Warning: 199 Miscellaneous warning
	WWWAuthenticate	Indicates the authentication scheme that should be used to access the requested entity. WWW-Authenticate: Basic

	Name	Description
	Name	Gets the original name of the field
	NormalizedName	Gets the normalized name of the field (lower case).

	Name	Description
	Equals	Overriden to compare HttpHeaderFieldNames by their normalized (to-lower) variant. This is because header field names are case insensitive.
	GetHashCode	Overriden because Equals was overriden. Returns the hash-code of the normalized (to-lower) variant.

	Name	Description
	rrOb
	SrOb
	trOb

Reference