Dim fileexits As Boolean

If IO.File.Exists("Pfad") Then
     fileexits = True
End If

        Dim y As String = "C:\Test"
        Dim x As String = "myfile.dat"
 
        Dim fp As String = IO.Path.Combine(y, x)
 
        Dim fileExists As Boolean = IO.File.Exists(fp)

Those people who think they know everything are a great annoyance to those of us who do - Isaac Asimov