Module Example
   Public Sub Main()
      Dim originalGuid As Guid = Guid.NewGuid()
      ' Create an array of string representations of the GUID.
      Dim stringGuids() As String = { originalGuid.ToString("B"),
                                      originalGuid.ToString("D"),
                                      originalGuid.ToString("X") }
      
      ' Parse each string representation.
      Dim newGuid As Guid
      For Each stringGuid In stringGuids
         If Guid.TryParse(stringGuid, newGuid) Then
            Console.WriteLine("Converted {0} to a Guid", stringGuid)
         Else
            Console.WriteLine("Unable to convert {0} to a Guid", 
                              stringGuid)
         End If     
      Next                                      
   End Sub
End Module