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Socket.EndReceiveMessageFrom Method

Ends a pending asynchronous read from a specific endpoint. This method also reveals more information about the packet than EndReceiveFrom.

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

public int EndReceiveMessageFrom(
	IAsyncResult asyncResult,
	ref SocketFlags socketFlags,
	ref EndPoint endPoint,
	out IPPacketInformation ipPacketInformation


Type: System.IAsyncResult
An IAsyncResult that stores state information and any user defined data for this asynchronous operation.
Type: System.Net.Sockets.SocketFlags%
A bitwise combination of the SocketFlags values for the received packet.
Type: System.Net.EndPoint%
The source EndPoint.
Type: System.Net.Sockets.IPPacketInformation%
The IPAddress and interface of the received packet.

Return Value

Type: System.Int32
If successful, the number of bytes received. If unsuccessful, returns 0.


asyncResult is null


endPoint is null.


asyncResult was not returned by a call to the BeginReceiveMessageFrom method.


EndReceiveMessageFrom was previously called for the asynchronous read.


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


The Socket has been closed.

If the operation has not completed, this method blocks until it does.

To perform this operation synchronously, use the ReceiveMessageFrom method.

Examine ipPacketInformation if you need to know if the datagram was sent using a unicast, multicast, or broadcast address.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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

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