Socket.Receive Method (Generic IList, SocketFlags, SocketError)

Note: This method is new in the .NET Framework version 2.0.

Receives data from a bound Socket into the list of receive buffers, using the specified SocketFlags.

This method is not CLS-compliant.  The CLS-compliant alternative is Receive(Byte[],SocketFlags).

Namespace: System.Net.Sockets
Assembly: System (in system.dll)

public int Receive (
	IList<ArraySegment<byte>> buffers,
	SocketFlags socketFlags,
	out SocketError errorCode
/** @attribute CLSCompliantAttribute(false) */ 
public int Receive (
	IList<ArraySegment<byte>> buffers, 
	SocketFlags socketFlags, 
	/** @attribute OutAttribute() */ /** @ref */ SocketError errorCode
JScript does not support passing value-type arguments by reference.



A list of ArraySegments of type Byte that contains the received data.


A bitwise combination of the SocketFlags values.


A SocketError object that stores the socket error.

Return Value

The number of bytes received.

Exception typeCondition


buffers is a null reference (Nothing in Visual Basic).


buffers.Count is zero.


An error occurred while attempting to access the socket. See the Remarks section for more information.


The Socket has been closed.

This method reads data into the buffers parameter and returns the number of bytes successfully read. You can call from both connection-oriented and connectionless sockets.

This overload requires you to provide one or more receive buffers. The SocketFlags value defaults to None.

If you are using a connection-oriented protocol, you must either call Connect to establish a remote host connection, or Accept to accept an incoming connection prior to calling Receive. The Receive method will only read data that arrives from the remote host connection established in the Connect or Accept method. If you are using a connectionless protocol, you can also use the ReceiveFrom method. ReceiveFrom will allow you to receive data arriving from any host.

If no data is available for reading, the Receive method will block until data is available, unless a time-out value was set by using Socket.ReceiveTimeout. If the time-out value was exceeded, the Receive call throws a SocketException. If you are in non-blocking mode, and there is no data available in the in the protocol stack buffer, the Receive method will complete immediately and throw a SocketException. You can use the Available property to determine if data is available for reading. When Available is non-zero, retry the receive operation.

If you are using a connection-oriented Socket, the Receive method will read as much data as is available, up to the size of the buffer. If the remote host shuts down the Socket connection with the Shutdown method, and all available data has been received, the Receive method will complete immediately and return zero bytes.

If you are using a connectionless Socket,Receive will read the first enqueued datagram from the destination address you specify in the Connect method. If the datagram you receive is larger than the size of the buffers parameter, buffers gets filled with the first part of the message, the excess data is lost and a SocketException is thrown.


If you receive a SocketException, use the SocketException.ErrorCode property to obtain the specific error code. After you have obtained this code, refer to the Windows Sockets version 2 API error code documentation in the MSDN library for a detailed description of the error.


This member outputs trace information when you enable network tracing in your application. For more information, see Network Tracing.

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0