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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: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0
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