AcManager.Pages.Dialogs.AcRootDirectorySelector.ViewModel.GetErrors C# (CSharp) Метод

            public IEnumerable GetErrors(string propertyName) {
                switch (propertyName) {
                    case nameof(Value):
                        return string.IsNullOrWhiteSpace(Value) ? new[] { AppStrings.Common_RequiredValue } :
                                IsValueAcceptable ? null : new[] { _previousInacceptanceReason ?? AppStrings.AcRoot_FolderIsUnacceptable };
                    default:
                        return null;
                }
            }