try
{
//连接端口
tcpClient.Connect(ip, port);
//连接成功时,关闭tcpClient,为下一轮扫描做准备
//tcpClient.Close();
//让tcpClient获得重生,可以无异常地进行下一轮扫描了
tcpClient = new System.Net.Sockets.TcpClient();
}
catch (System.Net.Sockets.SocketException ex)
{
}