public List <JoinBorrow> BorrowHistory()
{
if (account.AccountLevel < AccountLevelEnums.Librarian)
{
return(new List <JoinBorrow>());
}
return(BorrowMehod.Read());
}
public JoinBorrow BorrowHistory(int id)
{
bool isValid = id > 0 && account.AccountLevel >= AccountLevelEnums.Librarian;
if (!isValid)
{
throw new NotImplementedException();
}
return(BorrowMehod.Read(id));
}