Fix LibraryImportDiagnosticsAnalyzer and DownlevelLibraryImportDiagnosticsAnalyzer missing diagnostics when StringMarshalling is set#126691

Merged

jkoritzinsky merged 12 commits intomainfrom

copilot/fix-library-import-diagnostics-analyzer

Apr 24, 2026

Commits on Apr 9, 2026

Initial plan
Copilot
authored
Add regression tests for StringBuilder SYSLIB1051 with StringMarshalling

jkoritzinsky
and
Copilot
committed
Forward CharSet=Unicode to inner DllImport when StringMarshalling.Utf16 is set

jkoritzinsky
and
Copilot
committed

Commits on Apr 10, 2026

Commits on Apr 12, 2026

Fix DownlevelLibraryImportGenerator: add GeneratedCodeAnalysisFlags.Analyze, forward CharSet=Unicode, fix test assertion

Copilot
and
jkoritzinsky
authored

Commits on Apr 17, 2026

Commits on Apr 20, 2026

Commits on Apr 23, 2026

Filter diagnostics to only report from non-generated source: skip partial implementation part and filter by syntax tree

Copilot
and
jkoritzinsky
authored