Fix DateOnly/TimeOnly TryParse to throw on invalid DateTimeStyles and format specifiers#123805

Open

Copilot wants to merge 8 commits intomainfrom

copilot/fix-dateonly-parse-issue

Commits on Jan 30, 2026

Initial plan
Copilot
committed
Fix DateOnly and TimeOnly TryParse methods to throw for invalid DateTimeStyles

Copilot
and
tarekgh
committed
Add comprehensive tests for TryParseExact with invalid DateTimeStyles

Copilot
and
tarekgh
committed
Use AssertExtensions.Throws with style parameter for test consistency

Copilot
and
tarekgh
committed
Fix DateOnly.TryParse tests to use AssertExtensions.Throws for consistency

Copilot
and
tarekgh
committed
Remove unnecessary Argument_BadFormatSpecifier check from TryParse methods

Copilot
and
tarekgh
committed
Preserve Argument_BadFormatSpecifier from DateTimeParse and add tests for bad format specifiers

Copilot
and
tarekgh
committed
Return immediately when Argument_BadFormatSpecifier is encountered

Copilot
and
tarekgh
committed