TCP listener and Client

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C#

WPF

server

TCP/IP

TcpClient

, +

Hello guys

I am creating a wpf application in which I connect to android application through TCP listener. I made a separate class for tcp listener because i wanted to call it from all wpf forms.So till now its working fine from my main form but when i call tcp listener from another form i got an error i.e "Port is in use and only one port is permitted to use". If you have any solution please let me know..My code is


IPAddress localAddr = IPAddress.Parse(localIP);

TcpListener server = new TcpListener(localAddr, Port);
server.Stop();
server.Start();

it works from Main form but when I call it from another form the error occurs.
Any suggestion and solution is welcome.