UWP DataTemplate LoadContent has memory leak when the template root element is not a framework control

Question

Describe the bug

When calling
DataTemplate.LoadContent
, the memory will leak if the root element is not a framework control.

Steps to reproduce the bug

I create a repro demo here: https://github.com/h82258652/UWPDataTemplateLoadContentLeak

1. Launch demo.
2. Click the FrameworkTemplate button.
3. Click the GC collect button.
4. Click the Show alive count button, it should display Alive reference count: 0.
5. Click the UserControlTemplate button.
6. Click the GC collect button.
7. Click the Show alive count button, it should display Alive reference count: 100.
8. Click the FrameworkControlHostUserControlTemplate button.
9. Click the GC collect button.
10. Click the Show alive count button, it should display Alive reference count: 0.

Expected behavior

The seven step should display Alive reference count: 0.

Answer 1

How is this not a bug?