public StartSettingsWindow(StartWindow _startWindow, string?_workingDirectory) { Owner = _startWindow; startWindow = _startWindow; workingDirectory = _workingDirectory; InitializeComponent(); txtWorkingDirectory.Text = workingDirectory ?? NO_WORKING_DIRECTORY; if (_workingDirectory != null) { btnClear.IsEnabled = true; } Owner.LocationChanged += new EventHandler(OnOwnerMoves); }