.NET equivalent of Java FileChannel?
.net, c#, nio, tcp
Solution
You can read the data with a `NetworkStream`, then use the `CopyTo` extension method to write the data into a FileStream.
A manual approach, pre .NET4: How do I save a stream to a file in C#?
For sending, there is a `Socket.SendFile` method that directly sends a file, utilizing the Win32 `TransmitFile` method. Unfortunately there is no corresponding `Socket.ReceiveFile` method or `ReceiveFile` Win32 API.
Problem
I want to stream bytes directly from a TCP socket to a file on disk. In Java, it's possible to use NIO Channels, specifically `SocketChannel` and `FileChannel`. Quoting `FileChannel#transferFrom(...)`: This method is potentially much more efficient than a simple loop that reads from the source channel and writes to this channel. Many operating systems can transfer bytes directly from the source channel into the filesystem cache without actually copying them. Obviously I can just write the standard "copy loop" to read and write the bytes, and even take advantage of asynchronous I/O to minimize waiting. Will that be comparable to the platform native functionality that Java is taking advantage of, or is there another approach?