### Fixed
* Struct UnionCase doesn't seem to be a valid target for the DefaultAugmentationAttribute ([Issue #17499](https://github.com/dotnet/fsharp/issues/17499), [PR #17502](https://github.com/dotnet/fsharp/pull/17502))

### Added

* Enable C# collection expression support for F# lists & sets. ([Language suggestion #1355](https://github.com/fsharp/fslang-suggestions/issues/1355), [RFC FS-1145 (PR#776)](https://github.com/fsharp/fslang-design/pull/776), [PR #17359](https://github.com/dotnet/fsharp/pull/17359))
* Add module functions for converting between `'T option` and `'T voption`. ([PR #17436](https://github.com/dotnet/fsharp/pull/17436))

### Changed
* Change compiler default setting realsig+ when building assemblies ([Issue #17384](https://github.com/dotnet/fsharp/issues/17384), [PR #17378](https://github.com/dotnet/fsharp/pull/17385))
* Change compiler default setting for compressedMetadata ([Issue #17379](https://github.com/dotnet/fsharp/issues/17379), [PR #17383](https://github.com/dotnet/fsharp/pull/17383))
* Enable FSharp 9.0 Language Version ([Issue #17497](https://github.com/dotnet/fsharp/issues/17438)), [PR](https://github.com/dotnet/fsharp/pull/17500)))
* Struct UnionCase doesn't seem to be a valid target for the DefaultAugmentationAttribute ([Issue #17499](https://github.com/dotnet/fsharp/issues/17499), [PR #17502](https://github.com/dotnet/fsharp/pull/17502))
### Breaking Changes

