public bool AreNullOrNotRelated(Parent parent, Child child)
{
if (parent == null || child == null) return true;
if (!parent.HasChild(child))
{
throw new TardisBankException("'{0}' is not a child of '{1}'", child.UserName, parent.UserName);
}
return false;
}
void WithdrawInternal(Parent parent, decimal amount, string description, string insufficientFundsMessage)
{
if (parent == null)
{
throw new ArgumentNullException("parent");
}
if (description == null)
{
throw new ArgumentNullException("description");
}
if (!parent.HasChild(this))
{
throw new CashWithdrawException("Not Your Parent");
}
if (amount > Account.Balance)
{
throw new CashWithdrawException(insufficientFundsMessage);
}
Account.AddTransaction(description, -amount);
}
void WithdrawInternal(Parent parent, decimal amount, string description, string insufficientFundsMessage)
{
if (parent == null)
{
throw new ArgumentNullException("parent");
}
if (description == null)
{
throw new ArgumentNullException("description");
}
if (!parent.HasChild(this))
{
throw new CashWithdrawException("Not Your Parent");
}
if (amount > this.Account.Balance)
{
throw new CashWithdrawException(insufficientFundsMessage);
}
this.Account.AddTransaction(description, -amount);
}
