[XAML] Compile Errors for invalid references in XAML

[MAUIoxo]

Description

In the past, I was confronted with the situation that I re-created XAML views which included styles, e.g. a Style that was set in a Label but wasn’t actually defined anywhere in a Resource Dictionary. The style wasn’t available in the global styles.xml and also not in the local resource dictionary of the ContentPage/ContentView.

There were no compile errors, but the App just crashed for no obvious reason.

This feature request is about errors during Compile already to detect such missing things.

I say things as it can also happen that it is a binding to a property in a ViewModel or View which should be detected during Compile already as missing.

Public API Changes

Don’t know about API changes, just from a User/Developer perspective it would be great to have it.

Intended Use-Case

Early error detection for missing things like Styles, Bindings etc. that are unresolved and lead to crashes in the App when displaying a View/Page

Compile errors would already be sufficient, but maybe also a highlighting in the XAML already.