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ServiceBehaviorAttribute::ValidateMustUnderstand Property

Gets or sets a value that specifies whether the system or the application enforces SOAP MustUnderstand header processing.

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

public:
property bool ValidateMustUnderstand {
	bool get ();
	void set (bool value);
}

Property Value

Type: System::Boolean
true if the system is to perform SOAP header MustUnderstand processing; otherwise false, which indicates that the application performs this processing. The default value is true.

Use the ValidateMustUnderstand property to turn off the enforced validation of arriving message headers. In normal execution, message headers are compared against the UnderstoodHeaders property to confirm that arriving headers are explicitly handled by the service. Set this to false to disable this checking. When set to false, the application must check for headers marked with MustUnderstand="true" and return a fault if one or more of them were not understood. This is useful when the application is supposed to accept any incoming SOAP messages (for example, when using typed or untyped messages) and perform custom header processing.

.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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