[release/11.0.1xx-preview2] Add MauiXamlHotReload property for IDE communication#34219
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Introduces the MauiXamlHotReload MSBuild property to communicate to the IDE which type of XAML Hot Reload implementation the application expects. Values: - Legacy (default): Traditional XAML Hot Reload - SourceGen: Source generator-based XAML Hot Reload (experimental) When SourceGen is selected, a warning (MAUI1002) is emitted indicating this feature is experimental and not yet fully implemented. This property exists to facilitate migration from legacy XAML Hot Reload to the source generator-based approach. In a future release, Legacy may be deprecated with SourceGen becoming the only supported mode. Fixes #34027
Add case-insensitive comparison for SourceGen/Legacy values and emit MAUI1003 warning for unrecognized values. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
This was referenced Feb 25, 2026
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Backport of #34028 to release/11.0.1xx-preview2
/cc @StephaneDelcroix