Merge main into live#12536

Merged

dotnet-policy-service[bot] merged 3 commits intolivefrom

Apr 18, 2026

Commits on Apr 17, 2026

Fix docs on DataRow.Delete() (#12530)
roji
authored
Disallow edits on System.Text.RegularExpressions docs (#12529)

danmoseley
and
Copilot
authored
Port MetadataLoadContext.CoreAssembly nullability changes from dotnet/runtime#126142 (#12528)

authored