System.Windows.Data.BindingExpressionBase.AttachToNotifyError C# (CSharp) Method

		void AttachToNotifyError (INotifyDataErrorInfo element)
		{
			if (CurrentNotifyError == element || !Binding.ValidatesOnNotifyDataErrors)
				return;

			string property = "";
			if (PropertyPathWalker.FinalNode.PropertyInfo != null)
				property = PropertyPathWalker.FinalNode.PropertyInfo.Name;
			if (CurrentNotifyError != null) {
				CurrentNotifyError.ErrorsChanged -= NotifyErrorsChanged;
				MaybeEmitError (null, null);
			}

			CurrentNotifyError = element;

			if (CurrentNotifyError != null) {
				CurrentNotifyError.ErrorsChanged += NotifyErrorsChanged;
				if (CurrentNotifyError.HasErrors) {
					foreach (var v in CurrentNotifyError.GetErrors (property)) {
						MaybeEmitError (v as string, v as Exception);
					}
				} else {
					MaybeEmitError (null, null);
				}
			}
		}