TimeZoneInfo.GetAmbiguousTimeOffsets Method (DateTimeOffset)


The .NET API Reference documentation has a new home. Visit the .NET API Browser on docs.microsoft.com to see the new experience.

Returns information about the possible dates and times that an ambiguous date and time can be mapped to.

Namespace:   System
Assembly:  mscorlib (in mscorlib.dll)

member GetAmbiguousTimeOffsets : 
        dateTimeOffset:DateTimeOffset -> TimeSpan[]


Type: System.DateTimeOffset

A date and time.

Return Value

Type: System.TimeSpan[]

An array of objects that represents possible Coordinated Universal Time (UTC) offsets that a particular date and time can be mapped to.

Exception Condition

dateTimeOffset is not an ambiguous time.

The precise behavior of this method depends on the relationship between the Offset property of the dateTimeOffset parameter and the TimeZoneInfo object. If the value of the Offset property corresponds to the current time zone's possible offsets from Coordinated Universal Time (UTC) for that date and time, the method returns the possible offsets. Otherwise, it converts dateTimeOffset to the time in the current time zone, and then returns the possible offsets of that date and time.

The order of TimeSpan objects in the array returned by this method is undefined. However, you can determine which element represents an offset from the time zone's standard time by comparing its value with the time zone's BaseUtcOffset property. To map an ambiguous time to a time zone's standard time, see How to: Resolve Ambiguous Times.

Notes to Callers:

On Windows XP systems, this method applies only the current adjustment rule when determining whether dateTimeOffset is ambiguous if the current instance is TimeZoneInfo.Local. As a result, the method may not accurately report ambiguous time offsets for periods before the current adjustment rule came into effect. For more information, see the Notes for Callers section in the Local property.

Universal Windows Platform
Available since 8
.NET Framework
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
Return to top