What's Changed 🆕

• Improve nullable annotations in [ObservableProperty] generated code by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/944
• Add .targets to validate the Windows SDK version by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/942
• Update SDK package checks for .NET 9 SDK by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/952
• Allow forwarding attributes to property accessors by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/946
• Fix suppressions for custom attribute targets by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/964
• Add support for partial properties for [ObservableProperty] by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/966
• Update NuGet packages to latest stable by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/967
• Move some diagnostics to analyzers by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/968
• Bug fixes to generated partial properties by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/970
• Handle 'required' fields in partial property code fixer by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/972
• Remove 'this.' expressions in partial property code fixer by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/973
• Add MVVM Toolkit analyzers for WinRT scenarios by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/979
• Embed .pdb files for all analyzer projects by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/980
• Add more WinRT analyzers for class-level attributes by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/981
• Improve locations resolution for new analyzers by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/984
• Remove .NET 6 TFM by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/985
• Allow code blocks in issue template by @Poker-sang in https://github.com/CommunityToolkit/dotnet/pull/926
• Improve 'RequiresCSharpLanguageVersionPreviewAnalyzer' by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/988
• Use 'ref readonly' in 'IndexOf' APIs by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/997
• Added Stream over ReadOnlySequence by @paulomorgado in https://github.com/CommunityToolkit/dotnet/pull/808
• Fix message for one of the WinRT diagnostics by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/999
• New info diagnostic for WinRT AOT compatibility when C# is not 'preview' by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/1000
• Fix minor typos in comments. by @realybin in https://github.com/CommunityToolkit/dotnet/pull/974
• Minor diagnostics tweaks by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/1003
• Update Roslyn to 4.12 for new generators by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/1002
• Support fixing with attribute lists with multiple attributes by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/1008
• Emit consistent locations for 'MVVMTK0051' diagnostics by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/1009
• Add more analyzers, enable unit tests for partial properties by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/1010
• Support more partial property modifiers, ban pointer types by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/1015
• Update NuGet packages to latest stable by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/1016
• Refine filtering logic for [GeneratedBindableCustomProperty] analyzers by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/1019
• Improve test coverage for SpanExtensions.IndexOf by @Youssef1313 in https://github.com/CommunityToolkit/dotnet/pull/1023
• Add code fixer for semi-auto property to '[ObservableProperty]' partial property by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/1020
• Improve filtering in semi-auto property analyzer by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/1024
• Handle semi-auto properties with expression bodies by @Sergio0694 in https://github.com/CommunityToolkit/dotnet/pull/1026

New Contributors

• @Poker-sang made their first contribution in https://github.com/CommunityToolkit/dotnet/pull/926
• @paulomorgado made their first contribution in https://github.com/CommunityToolkit/dotnet/pull/808
• @realybin made their first contribution in https://github.com/CommunityToolkit/dotnet/pull/974

Full Changelog: https://github.com/CommunityToolkit/dotnet/compare/v8.3.2...v8.4.0