private async void LoadExchangeRateList()
{
if (isExchangeRateListLoaded)
{
return;
}
if (queryDispatcher == null)
{
return;
}
List <ExchangeRateModel> exchangeRates = await queryDispatcher.QueryAsync(new ListTargetCurrencyExchangeRates(UniqueCode));
if (exchangeRates == null)
{
return;
}
ExchangeRates.AddRange(exchangeRates);
ExchangeRates.SortDescending(e => e.ValidFrom);
RaisePropertyChanged(nameof(ExchangeRates));
isExchangeRateListLoaded = true;
}