UWP Resource Dictionary Issue

UWP documentation claims that styles can be applied to control types as a whole, by providing a TargetType attribute:

• UWP - ResourceDictionary and XAML resource references

However, that doesn't work.

So, I created this repository to provide a reproducable project, demonstrating an issue with the UWP resource handling system.

In this repository I created a ResourceDictionary file (Dictionary1.xaml) to store a Page's background color. Next, I referenced that ResourceDictionary in my main page (MainPage.xaml).

While the Visual Studio 2019 (16.7.7) designer correctly renders the Page's background color in red, the running program itself doesn't.

Screenshot depicting the issue:

Verification

To verify this issue, I posted a corresponding question at StackOverflow.

The result makes me believe that either the Microsoft documentation or the implementation of UWP is faulty.

Before I report this issue to the Microsoft UWP product team, I'll jump off by reporting this issue to the Microsoft UWP documentation team.