Visual Basic 2015 Unleashed

Constructors’ Inheritance

The previous section discussed the MyBase keyword and how it can be used to access members from a base class. The keyword also has another important purpose when it comes to constructors. Consider the following constructor, which is implemented within the Person class (that is, the base class) shown in the previous section:

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Public Sub New(firstName As String,               lastName As String,               age As Integer)    Me.FirstName = firstName    Me.LastName = lastName    Me.Age = ageEnd Sub

The problem now is in derived classes. The rule is that if you have a constructor receiving arguments in the base class, you do need to provide a constructor receiving arguments also within a ...