Pipe problem for interconnection between unity 5.1 and third app

Hi

I am trying to use named pipes in Unity to pass data to and from another application. I made test Pipe Server in VS2012

static void Main(string[] args) { CreatingPipeServerLoop(); }

 const byte sentServerValue = 1;
 const byte sentClientValue = 2;

     static public void CreatingPipeServerLoop()
     {
         while (true)
         {
            Thread.Sleep(500);
             
             using (NamedPipeServerStream pipeServer =
                 new NamedPipeServerStream("pipetest", PipeDirection.InOut))
             {
                 pipeServer.WaitForConnection();

                 Console.WriteLine("Client connected.");
                 try
                 {
                     byte answer = (byte)pipeServer.ReadByte();

                     pipeServer.WriteByte(sentServerValue);
                     pipeServer.Flush();
                 }

                 catch (Exception e)
                 {
                     Console.WriteLine("ERROR: {0}", e.Message);
                 }
             }
         }
     } 

And I made Pipe Client in Unity3d 5.1.2f1 :

 void Start () {

     System.Threading.Thread pipeThread = new System.Threading.Thread(delegate() { CreatingPipeClientLoop(); });
     pipeThread.Start();
 
 }
 
 // Update is called once per frame
 void Update () {
 
 }

 const byte sentServerValue = 1;
 const byte sentClientValue = 2;

 public void CreatingPipeClientLoop()
 {
     for (int i = 0; i < 100000; i++)
     {
         //byte respByte = 0;// MainBaseErrorExcess;
         using (NamedPipeClientStream pipeClient =
                new NamedPipeClientStream("pipetest"))
         {
             
             try
             {
                 pipeClient.Connect();
                 //Console.WriteLine("Server connected.");
                 
                 pipeClient.WriteByte(sentClientValue);
                 pipeClient.Flush();
                 byte respByte = (byte)pipeClient.ReadByte();
             }
             
             catch (System.Exception e)
             {
                 //Console.WriteLine("ERROR: {0}", e.Message);
             }
         }
     }
 }

I started Server and then Client in Unity3d 5.1.2f1. Server connected 1-2 times then Unity crashed. Some times pipeClient threw exception "The operation completed successfully". I launched this test project on 5 PC with Windows 7 (64 bit) every time Unity crashed. It worked only on PC with Windows 7 (32 bit) and Windows 7 on Mac. Also it worked in Unity 4.5, befor I updated Unity I did not know about the problem. How to implement exchange between Unity and another application?

Regards, Anatoly Frolkin.