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IDictionaryEnumerator.Key Property

Gets the key of the current dictionary entry.

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

abstract Key : Object with get

Property Value

Type: System.Object
The key of the current element of the enumeration.

ExceptionCondition
InvalidOperationException

The IDictionaryEnumerator is positioned before the first entry of the dictionary or after the last entry.

After an enumerator is created or after the Reset method is called, the MoveNext method must be called to advance the enumerator to the first element of the collection before reading the value of the Key property; otherwise, Key is undefined.

Key also throws an exception if the last call to MoveNext returned false, which indicates the end of the collection.

Key does not move the position of the enumerator, and consecutive calls to Key return the same object until either MoveNext or Reset is called.

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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