I have the following question:

I'm using the INotifyDataErrorInfo validation for validating my models.
Now i have the requirement to validate my model on "entity-level" so the whole state of the model object should be validated.

That's all working and the validation rules return an error but how can I now ensure that a Validation.Error event is raised for my model so I can catch it at the MainWindow-Level to display an error message?

For my Properties I write the following in xaml so a Validation.Error event is raised:

```xml
<TextBox Text="{Binding PropertyName, ValidatesOnNotifyDataErrors=True, NotifyOnValidationError=True}" />

```

I would be very happy if someone can provide a working example for me, Thanks!