What is inheritance? Create VB .Net console application to define person class and derive student and employee from it to demonstrate inheritance

Module Module1
    Public Class person
        Public personName As String
        Public phoneNumber As String
        Public Sub showPersonData()
            Console.writeLine("Name : " & personName)
            Console.writeLine("CPI : " & phoneNumber)
        End Sub
    End Class
    Public Class student
        Inherits person
        Public rollNumber As Integer
        Public cpi As Double
        Public Sub showStudentData()
            Console.WriteLine("Roll Number : " & rollNumber)
            Console.WriteLine("CPI : " & cpi)
        End Sub
    End Class
    Public Class employee
        Inherits person
        Public empId As Integer
        Public salary As Double
        Public Sub showEmployeeData()
            Console.WriteLine("Employee ID : " & empId)
            Console.WriteLine("Salary : " & salary)
        End Sub
    End Class
    Sub Main()
        Dim studentObj As student = New student()
        studentObj.personName = "Jaydip Panchal"
        studentObj.phoneNumber = 7878314409
        studentObj.rollNumber = 61
        studentObj.cpi = 7.28
        Console.writeLine("Student Data : ")
        studentObj.showPersonData()
        studentObj.showStudentData()
        Dim employeeObj As employee = New employee()
        employeeObj.personName = "Pratik Patel"
        employeeObj.phoneNumber = 9429389214
        employeeObj.empId = 50
        employeeObj.salary = 25000
        Console.writeLine("Employee Data : ")
        employeeObj.showPersonData()
        employeeObj.showEmployeeData()
        Console.ReadLine()
    End Sub
End Module

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