Find the next TCP port in .NET

Question

I want to create a new net.tcp://localhost:x/Service endpoint for a WCF service call, with a dynamically assigned new open TCP port.

I know that TcpClient will assig

Answer 1

I found the following code from Selenium.WebDriver DLL

Namespace: OpenQA.Selenium.Internal

Class: PortUtility

public static int FindFreePort()
{
    int port = 0;
    Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
    try
    {
        IPEndPoint localEP = new IPEndPoint(IPAddress.Any, 0);
        socket.Bind(localEP);
        localEP = (IPEndPoint)socket.LocalEndPoint;
        port = localEP.Port;
    }
    finally
    {
        socket.Close();
    }
    return port;
}