Inheriting from classes

The Person type we created earlier derived (inherited) from object, the alias for System.Object. Now, we will create a subclass that inherits from Person:

1. In the PacktLibrary project, add a new class file named Employee.cs.
2. Modify its contents to define a class named Employee that derives from Person, as shown in the following code:

   using System;
   namespace Packt.Shared;
   public class Employee : Person
   {
   }
   

3. In the PeopleApp project, in Program.cs, add statements to create an instance of the Employee class, as shown in the following code:

   Employee john = new()
   {
     Name = "John Jones",
     DateOfBirth = new(year: 1990, month: 7, day: 28)
   };
   john.WriteToConsole();
   

4. Run the code and view the result, as shown in the following output:

   John Jones was born on a Saturday.
   

Note that the Employee class has inherited all the members of Person.

Extending classes to add functionality...