public Expense(User user, string comment, decimal amount, Category category, DateTime date)
{
Comment = comment;
Amount = amount;
User = user;
Category = category;
Date = date;
User.WithdrawCash(amount);
}
public Saving(User user, string goalName, string description, decimal goalAmount, decimal initialAmount)
{
User = user;
GoalName = goalName;
Description = description;
GoalAmount = goalAmount;
InitialAmount = initialAmount;
User.WithdrawCash(initialAmount);
DepositCash(initialAmount);
}