Describe the rules applied when an identifier is accessed.

Design a "Car Rental" Visual C# application, which allows the user to search for and book a car rental. It is required to create a database file that contains at least three related tables, the first of which contains the cars data with the data fields, such as: car ID car type car model quantity on stock cost per day Make up at least five records in the first table and save your database file in the default folder of your project. The second table should contain the customer information, such as: customer ID first name last name telephone number credit card data The third table should contain the bookings data, such as: booking ID car ID customer ID pick-up date drop-off date total cost Please note that you can create more tables as well as add more data fields, if necessary. Your program should contain multiple Windows forms as follows: The first form will enable the user to search for a car rental. If a car rental is selected, the second form may provide more into about the car that…

Write the accessors for a property named CustomerNumber that assigns a string value to the _customerNumber field.

It is possible for the same property to have both a main key and an alternative key.