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XPathMessageFilterElementCollection.ContainsKey Method

Determines whether the XPathMessageFilterElementCollection contains an element with the specified key.

Namespace:  System.ServiceModel.Configuration
Assembly:  System.ServiceModel (in System.ServiceModel.dll)

public override bool ContainsKey(
	Object key


Type: System.Object

The key to look up in the collection.

Return Value

Type: System.Boolean
true if the key exists in the collection; otherwise, false.


key is null.


The type associated with key is invalid.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0

.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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