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System.Net Namespace
Visual Studio 2010
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.
| Class | Description | |
|---|---|---|
 | AuthenticationManager | Manages the authentication modules called during the client authentication process. |
| Authorization | Contains an authentication message for an Internet server. |
| Cookie | Provides a set of properties and methods that are used to manage cookies. This class cannot be inherited. |
| CookieCollection | Provides a collection container for instances of the Cookie class. |
| CookieContainer | Provides a container for a collection of CookieCollection objects. |
| CookieException | The exception that is thrown when an error is made adding a Cookie to a CookieContainer. |
| CredentialCache | Provides storage for multiple credentials. |
| Dns | Provides simple domain name resolution functionality. |
| DnsEndPoint | Represents a network endpoint as a host name or a string representation of an IP address and a port number. |
| DnsPermission | Controls rights to access Domain Name System (DNS) servers on the network. |
| DnsPermissionAttribute | Specifies permission to request information from Domain Name Servers. |
| DownloadDataCompletedEventArgs | Provides data for the DownloadDataCompleted event. |
| DownloadProgressChangedEventArgs | Provides data for the DownloadProgressChanged event of a WebClient. |
| DownloadStringCompletedEventArgs | Provides data for the DownloadStringCompleted event. |
| EndPoint | Identifies a network address. This is an abstract class. |
| EndpointPermission | Defines an endpoint that is authorized by a SocketPermission instance. |
| FileWebRequest | Provides a file system implementation of the WebRequest class. |
| FileWebResponse | Provides a file system implementation of the WebResponse class. |
| FtpWebRequest | Implements a File Transfer Protocol (FTP) client. |
| FtpWebResponse | Encapsulates a File Transfer Protocol (FTP) server's response to a request. |
| GlobalProxySelection | Obsolete. Contains a global default proxy instance for all HTTP requests. |
| HttpListener | Provides a simple, programmatically controlled HTTP protocol listener. This class cannot be inherited. |
| HttpListenerBasicIdentity | Holds the user name and password from a basic authentication request. |
| HttpListenerContext | Provides access to the request and response objects used by the HttpListener class. This class cannot be inherited. |
| HttpListenerException | The exception that is thrown when an error occurs processing an HTTP request. |
| HttpListenerPrefixCollection | Represents the collection used to store Uniform Resource Identifier (URI) prefixes for HttpListener objects. |
| HttpListenerRequest | Describes an incoming HTTP request to an HttpListener object. This class cannot be inherited. |
| HttpListenerResponse | Represents a response to a request being handled by an HttpListener object. |
| HttpVersion | Defines the HTTP version numbers that are supported by the HttpWebRequest and HttpWebResponse classes. |
| HttpWebRequest | Provides an HTTP-specific implementation of the WebRequest class. |
| HttpWebResponse | Provides an HTTP-specific implementation of the WebResponse class. |
| IPAddress | Provides an Internet Protocol (IP) address. |
| IPEndPoint | Represents a network endpoint as an IP address and a port number. |
| IPEndPointCollection | Represents a collection used to store network endpoints as IPEndPoint objects. |
| IPHostEntry | Provides a container class for Internet host address information. |
| NetworkCredential | Provides credentials for password-based authentication schemes such as basic, digest, NTLM, and Kerberos authentication. |
| OpenReadCompletedEventArgs | Provides data for the OpenReadCompleted event. |
| OpenWriteCompletedEventArgs | Provides data for the OpenWriteCompleted event. |
| ProtocolViolationException | The exception that is thrown when an error is made while using a network protocol. |
| ServicePoint | Provides connection management for HTTP connections. |
| ServicePointManager | Manages the collection of ServicePoint objects. |
| SocketAddress | Stores serialized information from EndPoint derived classes. |
| SocketPermission | Controls rights to make or accept connections on a transport address. |
| SocketPermissionAttribute | Specifies security actions to control Socket connections. This class cannot be inherited. |
| TransportContext | The TransportContext class provides additional context about the underlying transport layer. |
| UploadDataCompletedEventArgs | Provides data for the UploadDataCompleted event. |
| UploadFileCompletedEventArgs | Provides data for the UploadFileCompleted event. |
| UploadProgressChangedEventArgs | Provides data for the UploadProgressChanged event of a WebClient. |
| UploadStringCompletedEventArgs | Provides data for the UploadStringCompleted event. |
| UploadValuesCompletedEventArgs | Provides data for the UploadValuesCompleted event. |
| WebClient | Provides common methods for sending data to and receiving data from a resource identified by a URI. |
| WebException | The exception that is thrown when an error occurs while accessing the network through a pluggable protocol. |
| WebHeaderCollection | Contains protocol headers associated with a request or response. |
| WebPermission | Controls rights to access HTTP Internet resources. |
| WebPermissionAttribute | Specifies permission to access Internet resources. This class cannot be inherited. |
| WebProxy | Contains HTTP proxy settings for the WebRequest class. |
| WebRequest | Makes a request to a Uniform Resource Identifier (URI). This is an abstract class. |
| WebRequestMethods | Container class for WebRequestMethods::Ftp, WebRequestMethods::File, and WebRequestMethods::Http classes. This class cannot be inherited |
| WebRequestMethods::File | Represents the types of file protocol methods that can be used with a FILE request. This class cannot be inherited. |
| WebRequestMethods::Ftp | Represents the types of FTP protocol methods that can be used with an FTP request. This class cannot be inherited. |
| WebRequestMethods::Http | Represents the types of HTTP protocol methods that can be used with an HTTP request. |
| WebResponse | Provides a response from a Uniform Resource Identifier (URI). This is an abstract class. |
| WebUtility | Provides methods for encoding and decoding URLs when processing Web requests. |
| Interface | Description | |
|---|---|---|
 | IAuthenticationModule | Provides the base authentication interface for Web client authentication modules. |
| ICertificatePolicy | Validates a server certificate. |
| ICredentialPolicy | Defines the credential policy to be used for resource requests that are made using WebRequest and its derived classes. |
| ICredentials | Provides the base authentication interface for retrieving credentials for Web client authentication. |
| ICredentialsByHost | Provides the interface for retrieving credentials for a host, port, and authentication type. |
| IWebProxy | Provides the base interface for implementation of proxy access for the WebRequest class. |
| IWebProxyScript | Infrastructure. Provides the base interface to load and execute scripts for automatic proxy detection. |
| IWebRequestCreate | Provides the base interface for creating WebRequest instances. |
| Delegate | Description | |
|---|---|---|
 | AuthenticationSchemeSelector | Selects the authentication scheme for an HttpListener instance. |
| BindIPEndPoint | Represents the method that specifies a local Internet Protocol address and port number for a ServicePoint. |
| DownloadDataCompletedEventHandler | Represents the method that will handle the DownloadDataCompleted event of a WebClient. |
| DownloadProgressChangedEventHandler | Represents the method that will handle the WebClient::DownloadProgressChanged event of a WebClient. |
| DownloadStringCompletedEventHandler | Represents the method that will handle the DownloadStringCompleted event of a WebClient. |
| HttpContinueDelegate | Represents the method that notifies callers when a continue response is received by the client. |
| HttpListener::ExtendedProtectionSelector | A delegate called to determine the ExtendedProtectionPolicy to use for each HttpListener request. |
| OpenReadCompletedEventHandler | Represents the method that will handle the OpenReadCompleted event of a WebClient. |
| OpenWriteCompletedEventHandler | Represents the method that will handle the OpenWriteCompleted event of a WebClient. |
| UploadDataCompletedEventHandler | Represents the method that will handle the UploadDataCompleted event of a WebClient. |
| UploadFileCompletedEventHandler | Represents the method that will handle the UploadFileCompleted event of a WebClient. |
| UploadProgressChangedEventHandler | Represents the method that will handle the UploadProgressChanged event of a WebClient. |
| UploadStringCompletedEventHandler | Represents the method that will handle the UploadStringCompleted event of a WebClient. |
| UploadValuesCompletedEventHandler | Represents the method that will handle the UploadValuesCompleted event of a WebClient. |
| Enumeration | Description | |
|---|---|---|
 | AuthenticationSchemes | Specifies protocols for authentication. |
| DecompressionMethods | Represents the file compression and decompression encoding format to be used to compress the data received in response to an HttpWebRequest. |
| FtpStatusCode | Specifies the status codes returned for a File Transfer Protocol (FTP) operation. |
| HttpRequestHeader | The HTTP headers that may be specified in a client request. |
| HttpResponseHeader | The HTTP headers that can be specified in a server response. |
| HttpStatusCode | Contains the values of status codes defined for HTTP. |
| NetworkAccess | Specifies network access permissions. |
| SecurityProtocolType | Specifies the security protocols that are supported by the Schannel security package. |
| TransportType | Defines transport types for the SocketPermission and Socket classes. |
| WebExceptionStatus | Defines status codes for the WebException class. |
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