IPGlobalProperties IPGproperties = IPGlobalProperties.GetIPGlobalProperties();

TcpConnectionInformation[] connections = IPGproperties.GetActiveTcpConnections();
        
foreach (TcpConnectionInformation tcp in connections)
{
            //Displaying TCP connection informations
            StringBuilder sb = new StringBuilder();
            sb.Append("Local endpoint:\t"+tcp.LocalEndPoint.Address.ToString());
            sb.Append("\nRemote endpoint:\t"+ tcp.RemoteEndPoint.Address.ToString());
            sb.Append("\nState:\t\t"+ tcp.State.ToString());
            MessageBox.Show(sb.ToString(),"TCP connection status");
}