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X509KeyIdentifierClauseType Enumeration

An enumeration listing the possible types of X.509 key identifier clauses.

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

public enum X509KeyIdentifierClauseType

Member nameDescription
Supported by the .NET Compact FrameworkAnySubjectKeyIdentifier is used if present in the X.509 certificate, otherwise IssuerSerial is used.
ThumbprintThe X.509 Thumbprint is used.
Supported by the .NET Compact FrameworkIssuerSerialThe IssuerSerial reference is used: the issuer identifier plus a serial number that is unique for an issuer.
Supported by the .NET Compact FrameworkSubjectKeyIdentifierReference is based on the subject key identifier extension of an X.509 certificate (not all certificates have one, it is an optional property).
RawDataKeyIdentifierThe reference contains the raw data for the entire X.509 certificate.

The following code shows how to set the X509ReferenceStyle property to a member of this enumeration.

AsymmetricSecurityBindingElement abe =


X509SecurityTokenParameters istp =
   abe.InitiatorTokenParameters as X509SecurityTokenParameters;
if (istp != null)
    istp.X509ReferenceStyle =

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0

.NET Compact Framework

Supported in: 3.5