Visual Basic 2015 Unleashed

Overloading Constructors

Because constructors are effectively methods, they support the overloading feature. You can therefore provide multiple implementations of the New method, taking care of the limitations described for methods. You cannot use the Overloads keyword; the compiler does not need it. Continuing the example of the Contact class, you can provide different implementations of the constructor as follows:

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Public Sub New()    Me.FirstName = "Assigned later"    Me.LastName = "Assigned later"    Me.Email = "Assigned later"    Me.Address = "Assigned later"End SubPublic Sub New(ByVal surName As String)    If String.IsNullOrEmpty(surName) Then _        Throw New ArgumentException("surName")    Me.LastName = ...