Bloom.Api.ServerBase.AttemptToOpenPort C# (CSharp) Method

        private bool AttemptToOpenPort()
        {
            try
            {
                Logger.WriteMinorEvent("Attempting to start http listener on "+ ServerUrlEndingInSlash);
                _listener = new HttpListener {AuthenticationSchemes = AuthenticationSchemes.Anonymous};
                _listener.Prefixes.Add(ServerUrlEndingInSlash);
                _listener.Start();
                return true;
            }
            catch(HttpListenerException error)
            {
                Logger.WriteEvent("Here, file not found is actually what you get if the port is in use:" + error.Message);
                if (!Program.RunningUnitTests)
                    NonFatalProblem.Report(ModalIf.None,PassiveIf.Alpha, "Could not open " + ServerUrlEndingInSlash, "Could not start server on that port", error);
                try
                {
                    if(_listener != null)
                    {
                        //_listener.Stop();  this will always throw if we failed to start, so skip it and go to the close:
                        _listener.Close();
                    }
                }
                catch(Exception)
                {
                    //that's ok, we're just trying to clean up
                }
                finally
                {
                    _listener = null;
                }
                return false;
            }
        }