Cancel NamedPipeClientStream.Read call

.net, c#, multithreading, named-pipes

Solution

Use the NamedPipeClientStream constructor that takes a PipeOptions argument. Specifying PipeOptions.Asynchronous will complete the Read() call when you call the Close() method. The Read() method returns 0.

Problem

I've looked around all over the web, but I can't find an answer to the following question. I have a C#/.NET NamedPipeClientStream instance in a client program, and a worker thread is calling NamedPipeClientStream.Read(byte[], int, int) to get data from a server. The server sends data updates to the client. Read is a blocking call. If I want to close the client, is there a way to cancel/exit the Read call? I have tried calling Close on the named pipe instance, but it has no effect on the thread that called Read. I would think there would be a way to cancel a Read call. If not, it seems like that is a very poorly designed API, because your program is at the mercy of the pipe. Any info is greatly appreciated. -Chris

Original source