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The System.Net.Http namespace is designed to provide the following:

1. HTTP client components that allow users to consume modern web services over HTTP.

2. HTTP components that can be used by both clients and servers (HTTP headers and messages, for example). This provides a consistent programming model on both the client and the server side for modern web services over HTTP.

The System.Net.Http namespace and the related System.Net.Http.Headers namespace provide the following set of components:

1. HttpClient - the primary class used to send and receive requests over HTTP.

2. HttpRequestMessage and HttpResponseMessage - HTTP messages as defined in RFC 2616 by the IETF.

3. HttpHeaders - HTTP headers as defined in RFC 2616 by the IETF.

4. HttpClientHandler - HTTP handlers responsible for producing HTTP response messages.

Classes in the System.Net.Http and System.Net.Http.Headers namespaces can be used to develop Metro style apps or desktop apps. When used in a Metro style app, classes in the System.Net.Http and System.Net.Http.Headers namespaces are affected by network isolation feature, part of the application security model used by the Windows Developer Preview. The appropriate network capabilities must be enabled in the app manifest for a Metro style app for the system to allow network access by a Metro style app. For more information, see the Network Isolation for Metro Style Apps.

 Classes

	Class	Description
	ByteArrayContent	Provides HTTP content based on a byte array.
	DelegatingHandler	A base type for HTTP handlers that delegate the processing of HTTP response messages to another handler, called the inner handler.
	FormUrlEncodedContent	A container for name/value tuples encoded using application/x-www-form-urlencoded MIME type.
	HttpClient	Provides a base class for sending HTTP requests and receiving HTTP responses from a resource identified by a URI.
	HttpClientHandler	The default message handler used by HttpClient.
	HttpContent	A base class representing an HTTP entity body and content headers.
	HttpMessageHandler	A base type for HTTP message handlers.
	HttpMethod	A helper class for retrieving and comparing standard HTTP methods.
	HttpRequestException	A base class for exceptions thrown by the HttpClient and HttpMessageHandler classes.
	HttpRequestMessage	Represents a HTTP request message.
	HttpResponseMessage	Represents a HTTP response message.
	MessageProcessingHandler	A base type for handlers which only do some small processing of request and/or response messages.
	MultipartContent	Provides a collection of HttpContent objects that get serialized using the multipart/* content type specification.
	MultipartFormDataContent	Provides a container for content encoded using multipart/form-data MIME type.
	RtcRequestFactory	Represents the class that is used to create special HttpRequestMessage for use with the Real-Time-Communications (RTC) background notification infrastructure.
	StreamContent	Provides HTTP content based on a stream.
	StringContent	Provides HTTP content based on a string.
	WebRequestHandler	Provides desktop-specific features not available to Metro apps or other environments.

 Enumerations

	Enumeration	Description
	ClientCertificateOption	Specifies how client certificates are provided.
	HttpCompletionOption	Indicates if HttpClient operations should be considered completed either as soon as a response is available, or after reading the entire response message including the content.

 See Also

Reference

System.Net.Http.Headers