Catel.MVVM.Providers.UserControlLogic.RegisterViewModelAsChild C# (CSharp) 메소드

        private void RegisterViewModelAsChild()
        {
            var parentViewModel = _parentViewModel as IRelationalViewModel;
            if (parentViewModel == null)
            {
                return;
            }

            var viewModel = ViewModel as IRelationalViewModel;
            if (viewModel == null)
            {
                return;
            }

            if (ObjectHelper.AreEqualReferences(parentViewModel, viewModel))
            {
                return;
            }

            parentViewModel.RegisterChildViewModel(viewModel);
            viewModel.SetParentViewModel(_parentViewModel);
        }