Properly Handle “Connection reset by peer” in C#

Question

I'm building the c# example here https://github.com/coolaj86/fizzbuzz/blob/master/tcp-echo-csharp/Main.cs and running it against netcat .

When I exit netcat with CTRL + C it closes the socket and I get

Unhandled Exception: System.Net.Sockets.SocketException: Connection reset by peer
  at System.Net.Sockets.Socket.EndReceive (IAsyncResult result) [0x00000] in <filename unknown>:0 
  at echo.AsynchronousSocketListener.ReadCallback (IAsyncResult ar) [0x00000] in <filename unknown>:0

In other languages I've used, the FIN is represented as a read of 0 bytes (or an event called 'FIN' or 'end', etc), but I've modified the example to print out a message for a read of 0 bytes and I see no message.

How to I handle the client closing the connection?

I'm looking for an answer such as "Use System.Net.Foo.Bar.CloseHandler() or System.Net.Foo.Bar.ErrorHandler() ".

Answer 1

I'm not sure, but I think there is no way to do it gracefully. Because if connection close properly, you get notification about client disconnection. But interrupting program execution by CTRL + C isn't this case. So I advise you just handle exception to workout this problem.