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NameValueCollection.HasKeys Method

Gets a value indicating whether the NameValueCollection contains keys that are not a null reference (Nothing in Visual Basic).

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

member HasKeys : unit -> bool 

Return Value

Type: System.Boolean
true if the NameValueCollection contains keys that are not a null reference (Nothing in Visual Basic); otherwise, false.

This method is an O(1) operation.

.NET Framework

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

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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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