Client/Server TCPClient

[C# Programming]

Hi, I developed an Client / Server application, the problem is the following:
- when a wrong IP address is inserted in the Textbox, Client application freeze.

TcpClient socketForServer;
try
{
socketForServer = new TcpClient(Ip, Port);
}
catch (Exception e1) {
info._error = e1.ToString();
return info;
}

What I can do?