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

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

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

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

            viewModel.SetParentViewModel(null);
            parentViewModel.UnregisterChildViewModel(viewModel);
        }