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    <p>And...what exactly is your question?</p> <p>I'm not too strong with c#, but on c++, you either instantiate a thread, which perpetually listens with select for incoming data (making it 'Async' too) and then process it either in a synchronized method (use a CriticalSection if necessary).</p> <p>Just to clarify this, this is the general working method of a server/client communication.</p> <p>Server: Instantiates Socket, binds itself to port and listens for incoming connections. When connection comes in, performs handshake and adds the new client to a collection of clients. Responds to incoming requests/sends out periodic updates to all clients</p> <p>Client: Instantiates socket, uses 'connect' to connect to the server and starts to communicate according to protocol.</p> <p>Edit: Just to make sure, this isn't a trivial problem of miscommunication, do you mean how to SAVE the file at the client?</p> <p>You may want to use this code: (Assuming you're using select in a thread)</p> <pre><code>fd_set fds; //Watchlist for Sockets int RecvBytes; char buf[1024]; FILE *fp = fopen("FileGoesHere", "wb"); while(true) { FD_ZERO(&amp;fds); //Reinitializes the Watchlist FD_SET(sock, &amp;fds); //Adds the connected socket to the watchlist select(sock + 1, &amp;fds, NULL, NULL, NULL); //Blocks, until traffic is detected //Only one socket is in the list, so checking with 'FD_ISSET' is unnecessary RecvBytes = recv(sock, buf, 1024, 0); //Receives up to 1024 Bytes into 'buf' if(RecvBytes == 0) break; //Connection severed, ending the loop. fwrite(buf, RecvBytes, fp); //Writes the received bytes into a file } fclose(fp); //Closes the file, transmission complete. </code></pre>
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    1. POcommunication between C# async sockets and C++ winsock2
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    1. COWe have a function in managed C# code to send complete file by using sockets,
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    2. COYou may want to check the edited code. Did this code snippet answer your question? Or do you want to know, how to make a client socket under C?
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    3. COno , I just wanted to know that how the C++ client code will work against the server code of C# with a built in function of sendfile
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