fix: respect DateTimeKind in ToDateTimeOffset#335
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w-ahmad merged 1 commit intow-ahmad:mainfrom Apr 7, 2026
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ToDateTimeOffset always used TimeZoneInfo.Local offset, which throws 0x80070057 when passed a DateTime with DateTimeKind.Utc. Now checks DateTimeKind and uses TimeSpan.Zero for UTC DateTimes. Fixes w-ahmad#330
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Description
DateTimeExtensions.ToDateTimeOffset()always usedTimeZoneInfo.Local.GetUtcOffset(), which throws0x80070057("The UTC Offset for Utc DateTime instances must be 0") when passed aDateTimewithDateTimeKind.Utc.The fix checks
dateTime.Kindand usesTimeSpan.Zerofor UTC DateTimes, preserving existing behavior forUnspecifiedandLocalkinds.Changes
DateTimeExtensions.cs— CheckDateTimeKind.Utcbefore selecting the offsetDateTimeExtensionsTests.cs— AddedToDateTimeOffset_FromUtcDateTime_UsesZeroOffsettestFixes #330