HttpMessageContent Derived class which can encapsulate an or an as an entity with media type "application/http".

 MultipartFileData Represents a multipart file data.

 MultipartFileStreamProvider Represents an suited for writing each MIME body parts of the MIME multipart message to a file using a .

 MultipartFormDataStreamProvider An suited for use with HTML file uploads for writing file content to a . The stream provider looks at the <b>Content-Disposition</b> header field and determines an output based on the presence of a <b>filename</b> parameter. If a <b>filename</b> parameter is present in the <b>Content-Disposition</b> header field then the body part is written to a , otherwise it is written to a . This makes it convenient to process MIME Multipart HTML Form data which is a combination of form data and file content.

 MultipartMemoryStreamProvider Represents a multipart memory stream provider.

 MultipartRelatedStreamProvider Represents the provider for the multipart related multistream.

 ObjectContent Contains a value as well as an associated that will be used to serialize the value when writing this content.

 ObjectContent`1 Generic form of .

 PushStreamContent Enables scenarios where a data producer wants to write directly (either synchronously or asynchronously) using a stream.

 HttpClientExtensions Extension methods that aid in making formatted requests using .

 HttpClientFactory Represents the factory for creating new instance of .

 HttpContentExtensions Specifies extension methods to allow strongly typed objects to be read from HttpContent instances.

 HttpContentFormDataExtensions Extension methods to read HTML form URL-encoded datafrom instances.

 HttpContentMessageExtensions Provides extension methods to read and entities from instances.

 HttpContentMultipartExtensions Extension methods to read MIME multipart entities from instances.

 HttpRequestHeadersExtensions Provides extension methods for the class.

 HttpRequestMessageExtensions

 HttpResponseHeadersExtensions Provides extension methods for the class.

 UriExtensions Contains extension methods to allow strongly typed objects to be read from the query component of instances.

 MultipartStreamProvider Represents a stream provider that examines the headers provided by the MIME multipart parser as part of the MIME multipart extension methods (see ) and decides what kind of stream to return for the body part to be written to.