[Automated] PRs inserted in VS build main-11018.126 #80371
Description
- Change 17.15 to VS 2026 preview.
- Improve virtualproject support for older .NET SDKs
- Add the ability to preload parts of the project system
- Pull publish data directly from branch
- Fix sign type parameter in official build
- Ensure that top-level statements entry point emits MethodImplAttributes.Async
- Allow clients to send range ending at the line after the last line in the document
- Use immutable types in signature help
- Reduce allocations in SourceGeneratedDocumentIdentity.Generate
- Narrow conversion kinds considered when reinferring methods by nullable walker