Inheritance: DialogDocumentManagerService
            public ViewSettingsDialogDocument(ViewSettingsDialogDocumentManagerService owner, Form form, object content)
                : base(owner, form, content)
            {
                var viewModel = content as ViewModel.ViewSettingsViewModel;

                if (viewModel != null)
                {
                    viewModel.Document = this;
                }
            }
 public ViewSettingsDialogDocument(ViewSettingsDialogDocumentManagerService owner, Form form, object content)
     : base(owner, form, content) {
     var viewModel = content as ViewModel.ViewSettingsViewModel;
     if(viewModel != null) viewModel.Document = this;
 }