' This method handles PropertyError events that occur while 
' saving the configuration of an object.
Public Sub OnSavePropertyError(ByVal saver As Mpx.ConfigSaver, 
ByVal e As Mpx.ConfigSavePropertyErrorEventArgs)
    If e.ErrorCode = Mpx.ConfigSaveErrorCode.Internal Then
        ' Cancel the save operation
        saver.Cancel()
        System.Console.WriteLine("Canceled!")
    End If
End Sub

// This method handles PropertyError events that occur while saving
// the configuration of an object.
public void OnSavePropertyError(Mpx.ConfigSaver saver,
   Mpx.ConfigSavePropertyErrorEventArgs e)
{
   if (e.ErrorCode == Mpx.ConfigSaveErrorCode.Internal)
   {
      // Cancel the save operation
      saver.Cancel();
      System.Console.Write("Canceled!\n");
   }
}