Dictionary.KeyCollection.Dictionary.KeyCollection Constructor

Initializes a new instance of the Dictionary.KeyCollection class that reflects the keys in the specified Dictionary.

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

public KeyCollection (
	Dictionary<TKey,TValue> dictionary
public KeyCollection (
	Dictionary<TKey,TValue> dictionary
public function KeyCollection (
	dictionary : Dictionary<TKey,TValue>
Not applicable.



The Dictionary whose keys are reflected in the new Dictionary.KeyCollection.

Exception typeCondition


dictionary is a null reference (Nothing in Visual Basic).

The Dictionary.KeyCollection is not a static copy; instead, the Dictionary.KeyCollection refers back to the keys in the original Dictionary. Therefore, changes to the Dictionary continue to be reflected in the Dictionary.KeyCollection.

This constructor is an O(1) operation.

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

.NET Compact Framework

Supported in: 2.0

XNA Framework

Supported in: 1.0

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