Document IANA time zone support on Windows in FindSystemTimeZoneById #11896
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Added clarification that starting with .NET 6, Windows systems support IANA time zone identifiers (like "America/Los_Angeles" or "Pacific/Auckland") in addition to Windows registry time zones. This provides cross-platform time zone resolution capabilities. The previous documentation only mentioned Windows registry lookups for Windows systems, which could mislead developers into thinking IANA identifiers only work on Linux and macOS. Fixes dotnet#10713
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Summary
FindSystemTimeZoneByIdprovides cross-platform time zone resolutionDetails
The
FindSystemTimeZoneByIdmethod documentation previously only mentioned that Windows systems use registrylookups while Linux and macOS use the ICU Library. This could mislead developers into thinking IANA time zone
identifiers (like "Pacific/Auckland") only work on non-Windows platforms.
What Changed
Updated the Remarks section to clarify:
Why This Matters
This enhancement in .NET 6 allows developers to:
Without this documentation update, developers might unnecessarily write platform-specific code or miss out on this
cross-platform capability.
Fixes #10713