System.Net.Sockets Namespace

Reference

Important

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Provides a managed implementation of the Windows Sockets (Winsock) interface for developers who need to tightly control access to the network.

Classes

HttpPolicyDownloaderProtocol	Downloads the policy file that an instance of the Socket class will use.
IPv6MulticastOption	Contains option values for joining an IPv6 multicast group.
LingerOption	Specifies whether a Socket will remain connected after a call to the Close() or Close() methods and the length of time it will remain connected, if data remains to be sent.
MulticastOption	Contains IPAddress values used to join and drop multicast groups.
NetworkStream	Provides the underlying stream of data for network access.
SafeSocketHandle	Represents a wrapper class for a socket handle.
SendPacketsElement	Represents an element in a SendPacketsElement array.
Socket	Implements the Berkeley sockets interface.
SocketAsyncEventArgs	Represents an asynchronous socket operation.
SocketException	The exception that is thrown when a socket error occurs.
SocketPolicy	Represents a policy file instance.
SocketTaskExtensions	This class contains extension methods to the Socket class.
TcpClient	Provides client connections for TCP network services.
TcpListener	Listens for connections from TCP network clients.
UdpAnySourceMulticastClient	A client receiver for multicast traffic from any source, also known as Any Source Multicast (ASM) or Internet Standard Multicast (ISM).
UdpClient	Provides User Datagram Protocol (UDP) network services.
UdpSingleSourceMulticastClient	A client receiver for multicast traffic from a single source, also known as Source Specific Multicast (SSM).
UnixDomainSocketEndPoint	Represents a Unix Domain Socket endpoint as a path.

Structs

IPPacketInformation	Presents the packet information from a call to ReceiveMessageFrom(Byte[], Int32, Int32, SocketFlags, EndPoint, IPPacketInformation) or EndReceiveMessageFrom(IAsyncResult, SocketFlags, EndPoint, IPPacketInformation).
SocketInformation	Encapsulates the information that is necessary to duplicate a Socket.
SocketReceiveFromResult	The result of a ReceiveFromAsync(Socket, ArraySegment<Byte>, SocketFlags, EndPoint) operation.
SocketReceiveMessageFromResult	The result of a ReceiveMessageFromAsync(Socket, ArraySegment<Byte>, SocketFlags, EndPoint) operation.
UdpReceiveResult	Presents UDP receive result information from a call to the ReceiveAsync() method.

Enums

AddressFamily	Specifies the addressing scheme that an instance of the Socket class can use.
IOControlCode	Specifies the IO control codes supported by the IOControl(Int32, Byte[], Byte[]) method.
IPProtectionLevel	A value that enables restriction of an IPv6 socket to a specified scope, such as addresses with the same link local or site local prefix.
ProtocolFamily	Specifies the type of protocol that an instance of the Socket class can use.
ProtocolType	Specifies the protocols that the Socket class supports.
SelectMode	Defines the polling modes for the Poll(Int32, SelectMode) method.
SocketAsyncOperation	The type of asynchronous socket operation most recently performed with this context object.
SocketClientAccessPolicyProtocol	Specifies the method to download a client access policy file.
SocketError	Defines error codes for the Socket class.
SocketFlags	Specifies socket send and receive behaviors.
SocketInformationOptions	Describes states for a Socket.
SocketOptionLevel	Defines socket option levels for the SetSocketOption(SocketOptionLevel, SocketOptionName, Int32) and GetSocketOption(SocketOptionLevel, SocketOptionName) methods.
SocketOptionName	Defines configuration option names.
SocketShutdown	Defines constants that are used by the Shutdown(SocketShutdown) method.
SocketType	Specifies the type of socket that an instance of the Socket class represents.
TransmitFileOptions	The TransmitFileOptions enumeration defines values used in file transfer requests.

Delegates

SecurityCriticalAction

Represents a security critical action.

Remarks

The TcpClient, TcpListener, and UdpClient classes encapsulate the details of creating TCP and UDP connections to the Internet.

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