To test nullable type variables for Nothing values, use the Is operator or the IsNot operator. : nullable « Language Basics « VB.Net

1. VB.Net
2. Language Basics
3. nullable

To test nullable type variables for Nothing values, use the Is operator or the IsNot operator.

  

Module Module1
    Sub Main()

        Dim n? As Integer

        Console.WriteLine(n Is Nothing)
        n = 4

        Console.WriteLine(n Is Nothing)
        n = Nothing

        Console.WriteLine(n IsNot Nothing)
    End Sub
End Module

   
    
  

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