ItemsRepeater leak repro project

Info

When an ItemsRepeater is removed from the visual tree while there is an object or objects in its ItemsSource collection, the ItemsRepeater is not released from memory. If the ItemsReapeater does not have any children, its released correctly.

Repro project

• Build and deploy the project
• Click the "Create a new one" button twice to create a new MyUserControl and add it to the visual tree
  • MyUserControl contains an ItemsRepeater which is added to a static collection of WeakReference<ItemsRepeater> instances
• Observe the "Alive count" text in the top right, which counts the number of active WeakReference<ItemsRepeater> instances

The text should say "Alive count: 1" since two instances of MyUserControl were created, and the first one should have been released along with its ItemsRepeater, instead it will say "Alive count: 2".