NamedPipeServerStream calls Async callback when disposed

Hallo!

I've got a strange behaviour of the NamedPipeServerStream class.
It calls async callback function, when disposing.

1. I start async wait for connection

pipeServer =

newNamedPipeServerStream("MyPipe", PipeDirection.InOut,1,PipeTransmissionMode.Byte,PipeOptions.Asynchronous);

pipeServer.BeginWaitForConnection(

newAsyncCallback(PipeWaitConnectionCallback), null);

2. Next, I finish it by disposing the pipe.

pipeServer.Dispose();

3. At this point, somewhere in Dispose method  PipeWaitConnectionCallback is called and I get ObjectDisposedException in a call to pipeServer.EndWaitForConnection


The question is - why callback method is called in Dispose of NamedPipeServerStream? I am really not expect such behaviour.