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NameValueCollection.HasKeys Method

Gets a value indicating whether the NameValueCollection contains keys that are not null.

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

public bool HasKeys()

Return Value

Type: System.Boolean
true if the NameValueCollection contains keys that are not null; otherwise, false.

This method is an O(1) operation.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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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