/// <summary>
        /// Add a new frequency.
        /// </summary>
        /// <param name="newFrequency">The frequency to be added.</param>
        public void AddFrequency(ISDBSatelliteFrequency newFrequency)
        {
            foreach (ISDBSatelliteFrequency oldFrequency in Frequencies)
            {
                if (oldFrequency.Frequency == newFrequency.Frequency)
                {
                    if (oldFrequency.Polarization == newFrequency.Polarization)
                    {
                        return;
                    }
                    else
                    {
                        if (oldFrequency.Polarization.PolarizationAbbreviation.CompareTo(newFrequency.Polarization.PolarizationAbbreviation) > 0)
                        {
                            Frequencies.Insert(Frequencies.IndexOf(oldFrequency), newFrequency);
                            return;
                        }
                    }
                }

                if (oldFrequency.Frequency > newFrequency.Frequency)
                {
                    Frequencies.Insert(Frequencies.IndexOf(oldFrequency), newFrequency);
                    return;
                }
            }

            Frequencies.Add(newFrequency);
        }