public BudgetedAmount AddBudgetedAmount(MoneyAmount amount, DateTime validFrom)
{
var budgetedAmount = BudgetedAmount.Create(this, amount, validFrom);
if (BudgetedAmounts.Any(x => x.ValidFrom == budgetedAmount.ValidFrom))
{
throw new BusinessException("Another budgeted amount starting at same date");
}
BudgetedAmounts.Add(budgetedAmount);
return(budgetedAmount);
}
