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vb.net - Visual Basic not recognizing Path.GetFileName Method

I am following this page in trying to get the filename in my Visual Basic application. When I start to type 'Path', the Visual Studio 2010 IDE does not recognize Path.GetFileName. How do I get Visual Studio 2010 to recognize the Path.GetFIleName method?

Here is the official Microsoft page.

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Is it possible that you're not referencing the System.IO namespace? If you type System.IO.Path. does it then work? If so, keep that, or add Imports System.IO to the top of your file.

Imports System.IO

Module Module1

    Sub Main()
        Dim x As String = Path.GetFileName("")

    End Sub

End Module

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