Socket.Shutdown Method

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Disables sends and receives on a Socket.

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


Public Sub Shutdown ( _
    how As SocketShutdown _
public void Shutdown(
    SocketShutdown how



Exception Condition

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


The Socket has been closed.


When using a connection-oriented Socket, always call the Shutdown method before closing the Socket. This ensures that all data is sent and received on the connected socket before it is closed.

Call the Close method to free all managed and unmanaged resources associated with the Socket. Do not attempt to reuse the Socket after closing.

The following table shows the SocketShutdown enumeration values that are valid for the how parameter.




Disable sending on this Socket.


Disable receiving on this Socket.


Disable both sending and receiving on this Socket.

Setting how to Send specifies that subsequent calls to SendAsync are not allowed.

Setting how to Receive specifies that subsequent calls to ReceiveAsync are not allowed. This has no effect on lower protocol layers. For a connection-oriented protocol, the connection is terminated if either of the following conditions exist after a call to Shutdown :

  • Data is in the incoming network buffer waiting to be received.

  • More data has arrived.

Setting how to Both disables both sends and receives as described above.


If you receive a SocketException when calling this method, 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.

Version Information


Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1


For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.