public delegate void EventHandler();
class someClass
{
    WrapperForm dlg = null;
    StreamReader reader ;
    System.Timers.Timer timer;
    static NamedPipeServerStream server;
    public void CallToChildThread(Object stateInfo)
    {
        AutoResetEvent autoEvent = (AutoResetEvent)stateInfo;
        if (server.IsConnected)
        {
            string tempString = reader.ReadLine();
            server.Flush();
        //Fire event
          _show.Invoke();
        }
        else
        {
            server.WaitForConnectionAsync();
        }
        autoEvent.Set();
    }
    public someClass()
    {
        public static event EventHandler _show;
        server = new NamedPipeServerStream("TagCnfConnection", PipeDirection.InOut, 1, PipeTransmissionMode.Byte, PipeOptions.Asynchronous);
        server.WaitForConnectionAsync();
        initializeDialog(); // Initialize the dialog. Standard new
        reader = new StreamReader(server);
        var autoEvent = new AutoResetEvent(false);
        var stateTimer = new System.Threading.Timer(CallToChildThread,
                                   autoEvent, 1000, 250);
        _show += new EventHandler(eventCheck);
    }
    void eventCheck()
    {
        //If some condition
        dlg.ShowDialog();
    }
}

if (args == null)
            {
                PwLogger.WriteFeedback(Severity.PRI_CRITICAL, "No Aargument");
                return; // return if not
            }
            else //Do the work
            {
                StreamReader reader = null;
                StreamWriter writer = null;
                try
                {

                    NamedPipeClientStream client = new NamedPipeClientStream("TagCnfConnection");
                    client.Connect();
                    PwLogger.WriteFeedback(Severity.PRI_CRITICAL, "Connected");
                    //reader = new StreamReader(client);
                    writer = new StreamWriter(client);
                }
                catch(Exception e)
                {
                    PwLogger.WriteFeedback(Severity.PRI_CRITICAL, "Unable to connect to running TagCnf. Cannot display tag");
                }
                    // string input = Console.ReadLine();
                if (String.IsNullOrEmpty(args[0]))
                {
                     return;
                }
                writer.WriteLine(args[0]);
                writer.Flush();
                writer.Dispose();
                return;