Get free TCP Ports

TcpPorts.cs

using System.Net;
using System.Net.Sockets;

// taken from https://stackoverflow.com/questions/138043/find-the-next-tcp-port-in-net

public static class TcpPorts
{
    public static int GetFreeTcpPort()
    {
        var l = new TcpListener(IPAddress.Loopback, 0);
        l.Start();
        var port = ((IPEndPoint) l.LocalEndpoint).Port;
        l.Stop();
        return port;
    }
}