Socket.EndSendFile(IAsyncResult) completes the asynchronous send operation started in Socket.BeginSendFile(string, AsyncCallback, object).

Before calling Socket.BeginSendFile(string, AsyncCallback, object), you must create a callback method that implements the AsyncCallback delegate. This callback method executes in a separate thread and is called by the system after Socket.BeginSendFile(string, AsyncCallback, object) returns. The callback method must accept the IAsyncResult object returned by the Socket.BeginSendFile(string, AsyncCallback, object) method as a parameter.

Within the callback method, call the IAsyncResult.AsyncState method of the IAsyncResult parameter to obtain the sending System.Net.Sockets.Socket. After obtaining the System.Net.Sockets.Socket, you can call the Socket.EndSendFile(IAsyncResult) method to successfully complete the send operation.

If you are using a connectionless protocol, Socket.EndSendFile(IAsyncResult) blocks until the datagram is sent. If you are using a connection-oriented protocol, Socket.EndSendFile(IAsyncResult) blocks until the entire file is sent. There is no guarantee that the data you send will appear on the network immediately. To increase network efficiency, the underlying system may delay transmission until a significant amount of outgoing data is collected. A successful completion of the Socket.BeginSendFile(string, AsyncCallback, object) method means that the underlying system has had room to buffer your data for a network send.

Namespace: System.Net.Sockets
Assembly: System (in System.dll)
Assembly Versions: 2.0.0.0, 4.0.0.0