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System.Net Namespace

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The System.Net namespace provides a simple programming interface for many of the protocols used on networks today. The WebRequest and WebResponse classes form the basis of what are called pluggable protocols, an implementation of network services that enables you to develop applications that use Internet resources without worrying about the specific details of the individual protocols.

Classes

Class	Description
Public class	Cookie	Provides an object for use with HTTP requests to persist state information for a Silverlight-based application.
Public class	CookieCollection	Represents a collection of Cookie objects.
Public class	CookieContainer	Provides a container for a collection of CookieCollection objects.
Public class	CookieException	The exception that is thrown when adding a Cookie to a CookieCollection.
Public class	DnsEndPoint	Represents a network endpoint as a host name or a string representation of an IP address and a port number.
Public class	DownloadProgressChangedEventArgs	Provides data for the DownloadProgressChanged event of a WebClient.
Public class	DownloadStringCompletedEventArgs	Provides data for the DownloadStringCompleted event.
Public class	EndPoint	Identifies a network address. This is an abstract class.
Public class	HttpUtility	Provides methods for encoding and decoding HTML and URL strings.
Public class	HttpWebRequest	Provides an HTTP-specific implementation of the WebRequest class.
Public class	HttpWebResponse	Provides an HTTP-specific implementation of the WebResponse class.
Public class	IPAddress	Provides an Internet Protocol (IP) address.
Public class	IPEndPoint	Represents a network endpoint as an IP address and a port number.
Public class	NetworkCredential	Provides credentials for password-based authentication schemes such as basic, digest, NTLM, and Kerberos authentication.
Public class	OpenReadCompletedEventArgs	Provides data for the OpenReadCompleted event.
Public class	OpenWriteCompletedEventArgs	Provides data for the OpenWriteCompleted event.
Public class	ProtocolViolationException	The exception that is thrown when an error is made while using a network protocol.
Public class	SocketAddress	Stores serialized information from EndPoint derived classes.
Public class	UploadProgressChangedEventArgs	Provides data for the UploadProgressChanged event of a WebClient.
Public class	UploadStringCompletedEventArgs	Provides data for the UploadStringCompleted event.
Public class	WebClient	Provides common methods for sending data to and receiving data from a resource identified by a URI.
Public class	WebException	The exception that is thrown when an error occurs while accessing the network through a pluggable protocol.
Public class	WebHeaderCollection	Contains protocol headers associated with a request or response.
Public class	WebRequest	Makes a request to a Uniform Resource Identifier (URI). This is an abstract class.
Public class	WebResponse	Provides a response from a Uniform Resource Identifier (URI). This is an abstract class.
Public class	WriteStreamClosedEventArgs	Provides data for the WriteStreamClosed event.

Interfaces

Interface	Description
Public interface	ICredentials	Provides the base authentication interface for retrieving credentials for Web client authentication.
Public interface	IWebRequestCreate	Provides the base interface for creating WebRequest instances.

Delegates

Delegate	Description
Public delegate	DownloadProgressChangedEventHandler	Represents the method that will handle the WebClient.DownloadProgressChanged event of a WebClient.
Public delegate	DownloadStringCompletedEventHandler	Represents the method that will handle the DownloadStringCompleted event of a WebClient.
Public delegate	OpenReadCompletedEventHandler	Represents the method that will handle the OpenReadAsync event of a WebClient.
Public delegate	OpenWriteCompletedEventHandler	Represents the method that will handle the OpenWriteCompleted event of a WebClient.
Public delegate	UploadProgressChangedEventHandler	Represents the method that will handle the UploadProgressChanged event of a WebClient.
Public delegate	UploadStringCompletedEventHandler	Represents the method that will handle the UploadStringCompleted event of a WebClient.
Public delegate	WriteStreamClosedEventHandler	Represents the method that will handle the WriteStreamClosed event of a WebClient.

Enumerations

Enumeration	Description
Public enumeration	HttpRequestHeader	The HTTP headers that may be specified in a client request.
Public enumeration	HttpStatusCode	Contains the values of status codes defined for HTTP.
Public enumeration	WebExceptionStatus	Defines status codes for the WebException class.