private void StartListening()
{
txtIPAddress.Enabled = false;
txtPort.Enabled = false;
button1.Text = "Stop";
IsListening = true;
server = new TCPServer();
server.ClientConnected += server_ClientConnected;
server.ClientDisconnected += server_ClientDisconnected;
server.TextReceived += server_TextReceived;
server.ListenOnAddress = txtIPAddress.Text;
server.ListenOnPort = Convert.ToInt32(txtPort.Text);
server.StartTCPServer();
}