In C# thanks please,

Design a class named Person with properties for holding aperson’s name, address, and telephone number.

Design a class named Customer, which is derived from the Personclass. The Customer class should have the variables and propertiesfor the customer number, customer email, a spentAmount of thecustomer’s purchases, and a Boolean variable indicating whether thecustomer wishes to be on a mailing list. It also includes afunction named calcAmount that calculates the spentAmount.

All retail store has a preferred customer plan where customerscan earn discounts on all their purchases. The amount of acustomer’s discount is determined by the amount of the customer’scumulative purchases in the store as follows:

• When a preferred customer spends $500, he or she gets a 5%discount on all future purchases.
• When a preferred customer spends $1000, he or she gets a 6%discount on all future purchases.
• When a preferred customer spends $1500, he or she gets an 8%discount on all future purchases.
• When a preferred customer spends $2000, he or she gets a 10%discount on all future purchases.

Design a class named PreferredCustomer, which is derived fromthe Customer class. The PreferredCustomer class should have avariable, discountLevel, with a read-only property. It alsoincludesa setDiscountLevel function that determine the discount level basedon the purchases amount using switch statement and an overridefunction, calcAmount, calculates the spentAmount with the currentdiscount level.

Create a CustomerDemo class. In the main function, the programcalls the getData function to read the data from the“CustomerInfo.txt” file and create a dynamic array ofPreferredCustomer object.  Then, it prompts user to entera customer number and displays a menu:

1. Display Customer Information: display the specific customerinformation
2. Update Spent Amount: update the total amount with the correctdiscount level

After update the spent Amount, the program writes the updatedinformation back to file.

Example for customer info.txt below (there are 5 persons)

Kyle Jones

879 hobbs st. boston,MA 84758

456-789-0001

JLA9876A

[email protected]

3000

true

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