Release/v2.1.0.0 preview.1 - #417
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- Multi-target core + tests to net10.0;net11.0; C# 15 preview language only on net11 (net10 stays C# 14) - Pin global.json to .NET 11 RC SDK (11.0.100-rc.1.26425.128) and commit it - Bump package version to 2.1.0-preview.1 - Fix Zstd scaffold: .NET 11 RC1's System.IO.Compression has NO ZstandardStream, so the Zstd mode throws PlatformNotSupportedException honestly on all runtimes; gate Zstd tests with Assert.Skip until a runtime ships native Zstandard - net10.0: 1679 tests green / net11.0: 1685 tests green (6 Zstd tests skipped)
Additive SharpCoreDB.Net11.Net11Additions (source-gated via #if NET11_0_OR_GREATER): extension indexer db[tableName] to TableInfo, collection-expression capacity argument NewList(T), and a closed-hierarchy demo type. net11-gated tests added. net10.0 1679 tests green (unchanged), net11.0 1688 tests green (6 Zstd tests skipped).
…tream Previous commit wrongly disabled Zstd: the ref-pack XML search missed the type, but reflection against System.IO.Compression.dll (11.0.0-rc.1) confirms ZstandardStream(Stream, CompressionLevel, bool) and ZstandardCompressionOptions exist. Restore the original #if NET11_0_OR_GREATER implementation; Zstd tests now pass on net11 (0 skipped). net10.0 unchanged (PlatformNotSupportedException fallback, 1679 tests green).
net11.0 native Zstd path now uses ZstandardCompressionOptions: OptionalCompressionLevel maps to zstd quality (Fastest=1, Optimal=5, SmallestSize=19) and append a frame checksum for corruption detection on read. Brotli/GZip unchanged; net10 fallback unchanged (PlatformNotSupportedException). net11.0: 1688 tests green, 0 skipped.
Adds Features=runtime-async=on to the net11.0 target only: the compiler emits runtime-native async state machines (fewer allocations, cleaner stack traces). net10.0 is untouched (same async behavior for .NET 10 consumers). net11.0: 1688 tests green, 0 skipped.
Documents the multi-target net10.0;net11.0 preview: native Zstd (quality mapping + checksum), Runtime Async (net11 only), the opt-in SharpCoreDB.Net11 C# 15 API surface, what is deliberately deferred, and the backward-compatibility guarantees.
…es design pass - .github/workflows/ci-net11.yml: matrix over ubuntu/windows x net10.0/net11.0 for the preview branch (kept separate from master's ci.yml, installs both SDKs, runs the MTP test executable per framework). - docs/net11/UNION_TYPES_DESIGN.md: verified-against-RC1 blueprints for an opt-in SharpCoreDB.Unions namespace (union keyword + [Union]/IUnion), usage, backward-compat, perf notes, test strategy. - UPGRADE.md points to the design doc.
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