Fixing out of range exception on tree view

MaterialDesignInXAML / MaterialDesignInXamlToolkit

Google's Material Design in XAML & WPF, for C# & VB.Net.

http://materialdesigninxaml.net

MIT License

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Closed Keboo closed 1 month ago

Keboo commented 1 month ago

This occurs when IsExpanded is set on a virtualized container that has been removed.

Fixes #3572