public void Open() { var ofd = GetService <IOpenFileDialogService>(); ofd.Title = "Open checklist"; ofd.Filter = "xml file (*.clx)|*.clx"; var result = ofd.ShowDialog(); if (result) { CheckList.Open(new FileInfo(ofd.GetFullFileName())); RaisePropertyChanged(() => DxCheckList); FocusedItem = CheckList.Root.FirstOrDefault(); } }