Socket.DuplicateAndClose Method (Int32)


Duplicates the socket reference for the target process, and closes the socket for this process.

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

Public Function DuplicateAndClose (
	targetProcessId As Integer
) As SocketInformation


Type: System.Int32

The ID of the target process where a duplicate of the socket reference is created.

Return Value

Type: System.Net.Sockets.SocketInformation

The socket reference to be passed to the target process.

Exception Condition

targetProcessID is not a valid process id.


Duplication of the socket reference failed.

The target process should use Socket to create the duplicate socket instance.

If you call the Socket constructor multiple times with the same byte array as the argument for each call, you will create multiple managed Socket instances with the same underlying socket. This practice is strongly discouraged.

If the process creating the socket uses asynchronous methods (BeginReceive or BeginSend), the process must first set the UseOnlyOverlappedIO property to true; otherwise, the socket is bound to the completion port of the creating process, which may cause an ArgumentNullException to be thrown on the target process.

.NET Framework
Available since 2.0
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