Constructors and Destructors in VB.NET

Introduction to Constructors and Destructors in VB.NET

Explanation

Constructors and Destructors in VB.NET

Constructors used in a class are member functions to initialize or set the objects of a class in VB.net. They dont return any value and are defined in a Sub with a keyword New.
Multiple constructors can be created in class with any access specifiers, by default constructors are of Public access type.

Example:

Module Module1
Public Class Sample
Private a As Integer
Public Sub New(ByVal setval As Integer)
a = setval
End Sub
Public Function disp()
Return a
End Function
End Class
Sub Main()
Dim d As New Sample(5)
Console.WriteLine("Value of a is initialized to:")
Console.WriteLine(d.disp())
Console.Read()
End Sub
End Module

Result:

Value of a is initialized to:
5

Description:

In the above example, using the Constructor declared within the sub procedure New the value of a is set to 5.

Destructors:

Destructors or finalizer is a method used to deallocate the resources of an object that are no longer used, its invoked automatically by the VB.net environment. The keyword Overrides is used with the Finalizer method.