private string GetFlightTime(AirLeg airLeg)
        {
            string duration;

            AirLineMatricsManager airManager = new AirLineMatricsManager();

            return airManager.FormatTimeSpan(airManager.GetFlightTime(airLeg));
        }
        private string GetDuration(AirMaterial flight)
        {
            string duration = string.Empty;
            TimeSpan flightTime = TimeSpan.Zero;
            TimeSpan connectionTime = TimeSpan.Zero;

            AirLineMatricsManager airManager = new AirLineMatricsManager();

            flightTime = airManager.GetFlightTime(flight);
            connectionTime = airManager.GetDuration(flight);

            return String.Format("{0} ({1}", airManager.FormatTimeSpan(flightTime), airManager.FormatTimeSpan(connectionTime));
        }