Use C# to create Order class as follows:

a$.$ Data members: oid, orderDate, promisedDate, shipDate,

deliveryDate, amount, status.

b$.$ Behavioral members: isOnTime$()$ check if the delvieryDate is

ahead of promisedDate, timeToDelivery$()$ get number of days

from order to delivery, getLateFees$()$ company pays $1\%$ fee to

the customer for every day of delay in delivery according to the

contract.