System.Net.Http.Primitives Represents the file compression and decompression encoding format to be used to compress the data received in response to an . Do not use compression. Use the gZip compression-decompression algorithm. Use the deflate compression-decompression algorithm. Provides the base interface for implementation of proxy access for the class. Returns the URI of a proxy. A that specifies the requested Internet resource. A instance that contains the URI of the proxy used to contact . Indicates that the proxy should not be used for the specified host. The of the host to check for proxy use. true if the proxy server should not be used for ; otherwise, false. The credentials to submit to the proxy server for authentication. An instance that contains the credentials that are needed to authenticate a request to the proxy server. The System.Net.TransportContext class provides additional context about the underlying transport layer.