private bool Validate()
{
Log.Debug($"Income: Amount: {Amount}, Currency: {Currency}, When: {When}.");
ErrorMessages.Clear();
Validator.AddIncomeAmount(ErrorMessages, Amount);
Validator.AddIncomeDescription(ErrorMessages, Description);
Validator.AddIncomeCurrency(ErrorMessages, Currency);
Log.Debug($"Income: Validation: {string.Join(", ", ErrorMessages)}.");
return(ErrorMessages.Count == 0);
}