Editing Write to Netduino SD card

Note that many examples online indicate a simple file name "Test.txt"; I've found that only the full path works "\SD\Test.txt".

I'm using the Netguino Plus 2, which has an onboard SD card slot.  You do not need to "mount" the onboard SD card, per [http://forums.netduino.com/index.php?/topic/4349-onboard-microsd/].

'''You must use only an SD card, not an SDHC card; and a size limit of 2GB.'''

  Try
      Using SW As New System.IO.StreamWriter("\SD\Test.txt")
          SW.WriteLine("This is a test!")
      End Using
      Debug.Print("...")
  Catch ex As Exception
      Debug.Print("Error writing to SD card: " & ex.Message)
   End Try