private void UndoBtn_Click(object sender, RoutedEventArgs e)
{
if (DApp.Documents.Count == 0)
{
return;
}
try
{
DApp.ActiveDocument.Undo(1);
if (_selectedShapeRange != null)
{
DApp.ActiveDocument.ClearSelection();
_selectedShapeRange.AddToSelection();
_selectedShapeRange = null;
}
}
catch (Exception err) { MessageBox.Show(err.ToString(), MName, MessageBoxButton.OK, MessageBoxImage.Error); }
}