private InstrumentEditViewModel LoadInstrumentEditViewModel(int id)
        {
            Instrument instrument = null;

            if (id > 0)
            {
                instrument = _instrumentRepository.Get(id);
            }
            var vm = new InstrumentEditViewModel
            {
                Name         = (instrument != null) ? instrument.Name : string.Empty,
                Abbreviation = (instrument != null) ? instrument.Abbreviation : string.Empty
            };

            return(vm);
        }