foreach (TcpClient item in lstclients)
                    {
                        IPEndPoint remoteIpEndPoint = item.Client.RemoteEndPoint as IPEndPoint;
                        Task.Factory.StartNew(() => ThreadProc(item));
}

private void ThreadProc(object obj)
        {
            var client = (TcpClient)obj;
            NetworkStream stream1 = client.GetStream();
            // Do yourclient work here
            Byte[] bytes = new Byte[1024];
            String data1 = null;
            while (true)
            {
                // Console.WriteLine("Connected! to " + client.Client.RemoteEndPoint);
                data1 = null;

                int i;
                i = stream1.Read(bytes, 0, bytes.Length);
                data1 = System.Text.Encoding.ASCII.GetString(bytes, 0, i);
                scannerip = client.Client.RemoteEndPoint as IPEndPoint;
                this.InvokeEx(() => { AppendText(data1); });
                //AppendText(data1);
                // Thread.Sleep(1000);
            }
        }
        public void AppendText(String text)
        {


                switch (scannerip.Address.ToString())
                {
                    case "192.168.0.10":
                        //SetText(text, scannerip.Address.ToString());
                        txtScanner1.Text = text;

                        break;
                    case "192.168.0.11":
                        //  SetText(text, scannerip.Address.ToString());
                        txtScanner2.Text = text;

                        break;
                    case "192.168.0.12":
                        //  SetText(text, scannerip.Address.ToString());
                        txtScanner3.Text = text;

                        break;
                    case "192.168.0.13":
                        // SetText(text, scannerip.Address.ToString());
                        txtScanner4.Text = text;
                                              break;
                    case "192.168.0.14":
                        // SetText(text, scannerip.Address.ToString());
                        txtScanner5.Text = text;

                        break;
                    case "192.168.0.15":
                        // SetText(text, scannerip.Address.ToString());
                        txtScanner6.Text = text;

                        break;
                    case "192.168.0.16":
                        ///  SetText(text, scannerip.Address.ToString());
                        txtScanner7.Text = text;

                        break;
                    case "192.168.0.17":
                        // SetText(text, scannerip.Address.ToString());
                        txtScanner8.Text = text;

                        break;
                    case "192.168.0.18":
                        // SetText(text, scannerip.Address.ToString());
                        txtScanner9.Text = text;

                        break;
                    case "192.168.0.19":
                        //  SetText(text, scannerip.Address.ToString());
                        txtScanner10.Text = text;

                        break;
}