Visual Studio Next Generation: Language Enhancements

Polymorphism

Polymorphism refers to the ability to process objects differently depending on their data type or class. Additionally it provides the ability to redefine methods for derived classes. For example, given a base class of Employee, polymorphism enables the programmer to define different PayEmployee methods for any number of derived classes, such as Hourly or Salaried or Commissioned. No matter what type of Employee an object is, applying the PayEmployee method to it will return the correct results.

Class Employee
    Function PayEmployee()
       PayEmployee = Hours * HourlyRate
    End Function
Class CommissionedEmployee
    Inherits Employee
    Overrides Function PayEmployee()
       PayEmployee = BasePay + Commissions
    End Function

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