Language Basics VB.Net

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  4. To test reference type variables for Nothing values, use the Is operator or the IsNot operator
Module Module1
    Sub Main()
        Dim testObject As Object
        testObject = Nothing
        Console.WriteLine(testObject Is Nothing)
        Dim tc As New TestClass
        tc = Nothing
        Console.WriteLine(tc IsNot Nothing)
    End Sub
    Class TestClass
        Public field1 As Integer
        Dim field2 As Boolean
    End Class
End Module