C# WPF Anonymous Pipes AnonymousPipeClientStream pipe direction out doesn't work -

i'm developing test application communicate between 2 processes using anonymous pipes. can send message clientview serverview can't other way round since pipe connection throws exceptions.

servercode

 public class pipeserverhandler {     private static anonymouspipeserverstream serversenderstream;     private static anonymouspipeserverstream serverreceiverstream;     private static streamwriter sw;     private static streamreader sr;       public void serverstart()     {         serversenderstream = new anonymouspipeserverstream(pipedirection.out, handleinheritability.inheritable);         serverreceiverstream = new anonymouspipeserverstream(pipedirection.in, handleinheritability.inheritable);          string senderid = serversenderstream.getclienthandleasstring();         string receiverid = serverreceiverstream.getclienthandleasstring();          processstartinfo process = new processstartinfo(@"c:\users\vinushap\documents\visual studio 2015\projects\communicationproject\clientview\bin\debug\clientview.exe", senderid + "_" + receiverid);         process.useshellexecute = false;          process clientprocess = process.start(process);          serversenderstream.disposelocalcopyofclienthandle();          sr = new streamreader(serverreceiverstream);     }      public string readdata()     {         string temp;         temp = sr.readline();          return temp;     } } 

client code

public class pipeclienthandler {      private static anonymouspipeclientstream clientreceiverstream;     private static anonymouspipeclientstream clientsenderstream;     private static streamreader sr;     private static streamwriter sw;      public void clientstart(string[] args)     {         string[] id = args[0].split('_');         string senderid = id[0];         string receiverid = id[1];          clientreceiverstream = new anonymouspipeclientstream(pipedirection.in, senderid);         clientsenderstream = new anonymouspipeclientstream(pipedirection.out, receiverid);          sw = new streamwriter(clientsenderstream);         sw.autoflush = true;     }      public void writestream(string data)     {         sw.writeline(data);         clientsenderstream.waitforpipedrain();     }  } 

this app.xaml.cs class captures command line args

private void application_startup(object sender, startupeventargs e)     {         pipeclienthandler handler = new pipeclienthandler();          if (e.args.length > 0)         {             handler.clientstart(e.args);         }     } 

when sending data pipeserverhandler pipeclienhandler works well, when send data pipeclienthandler pipeserverhandler doesn't show me messages.

clientsenderstream error

i know bit old, anonymous pipes 1 way. you'll need 2 anonymous pipes 2 way communications.