ByteArrayContent

 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 A base class for HTTP handler implementations.

 HttpMessageInvoker

 HttpMethod A helper class for retrieving and comparing standard HTTP methods.

 HttpRequestException A base class for exceptions thrown by the and classes.

 HttpRequestMessage Represents a HTTP request message.

 HttpResponseMessage Represents a HTTP response message.

 MultipartContent Provides a collection of objects that get serialized using the multipart/* content type specification.

 MultipartFormDataContent Provides a container for content encoded using multipart/form-data MIME type.

 StreamContent Provides HTTP content based on a stream.

 StringContent Provides HTTP content based on a string.

 ClientCertificateOption

 HttpCompletionOption Indicates if operations should be considered completed either as soon as a response is available, or after reading the entire response message including the content.

 DelegatingHandler A base type for HTTP handlers that delegate the processing of HTTP response messages to another handler, called the inner handler.

 HttpContent A base class representing an HTTP entity body and content headers.

 HttpMessageHandler A base type for HTTP message handlers.

 MessageProcessingHandler A base type for handlers which only do some small processing of request and/or response messages.