avalonia-data-templates

To define an Avalonia DataTemplate for a ListBox or ContentControl, register the template in Application.DataTemplates or set ItemTemplate and ContentTemplate directly on the control, enabling runtime-type matching to render the corresponding view model.

The best way to render hierarchical data in an Avalonia TreeView is using TreeDataTemplate, which supports hierarchical view model rendering and integrates with compiled bindings via x:DataType for type safety and performance.

Compiled binding with x:DataType improves Avalonia DataTemplate performance and type safety by resolving bindings at compile time, ensuring proper template scope resolution across app-level and per-control templates.

Yes, you can use different templates for the same control by implementing IDataTemplate selectors or FuncDataTemplate, enabling dynamic template assignment and flexible rendering based on runtime object types.

Use app-level DataTemplates in Avalonia for consistent UI composition across multiple controls, and use per-control templates when you need isolated template scope resolution or specific rendering for a single control like a DataGrid.