gistfile1.cs

private const int PORT_NUMBER = 1852; // the port number to used for SpecFlow testing

[BeforeTestRun()]
public static void StartWebServer()
{
    if (ExistsPort())
        return;

    // settings
    string LocalHostUrl = string.Format("http://localhost:{0}", PORT_NUMBER);
    string PhysicalPath = Path.GetFullPath(@"..\..\..\Web");  //  the path of compiled web app

    // create a new process to start the ASP.NET Development Server
    Process process = new Process();

    /// configure the web server
    process.StartInfo.FileName = @"C:\Program Files\Common Files\Microsoft Shared\DevServer\10.0\WebDev.WebServer40.EXE";
    process.StartInfo.Arguments = string.Format("/port:{0} /path:\"{1}\" /virtual:\"{2}\"", PORT_NUMBER, PhysicalPath, LocalHostUrl);
    process.StartInfo.CreateNoWindow = true;
    process.StartInfo.UseShellExecute = false;

    // start the web server
    var started = process.Start();
}

private static bool ExistsPort()
{
    var ipGlobalProperties = IPGlobalProperties.GetIPGlobalProperties();
    return ipGlobalProperties.GetActiveTcpConnections().Any(info => info.LocalEndPoint.Port == PORT_NUMBER);
}