private async void OnSave()
        {
            var editingCurrency = Mapper.Map <EditableCurrency, Currency>(Currency);

            try
            {
                if (EditMode)
                {
                    await _currenciesService.UpdateCurrencyAsync(editingCurrency);
                }
                else
                {
                    await _currenciesService.AddCurrencyAsync(editingCurrency);
                }
                Done?.Invoke();
            }
            catch (Exception ex)
            {
                Failed.Invoke(ex);
            }
            finally
            {
                Currency = null;
            }
        }
        public void SetCurrency(Currency currency)
        {
            Currency = Mapper.Map <Currency, EditableCurrency>(currency);
            Currency.ValidationDelegate += Currency_ValidationDelegate;

            Currency.ErrorsChanged += RaiseCanExecuteChanged;
        }