Public Sub ValidateBeforeActivate( _
   ByVal context As OperationContext, _
   ByVal clientSignature As SignatureData, _
   ByVal clientSoftwareCertificates As List(Of SoftwareCertificate), _
   ByVal userIdentityToken As ExtensionObject, _
   ByVal userTokenSignature As SignatureData, _
   ByVal localeIds As StringCollection, _
   ByVal serverNonce() As Byte, _
   ByRef identityToken As UserIdentityToken, _
   ByRef userTokenPolicy As UserTokenPolicy _
) 

public void ValidateBeforeActivate( 
   OperationContext context,
   SignatureData clientSignature,
   List<SoftwareCertificate> clientSoftwareCertificates,
   ExtensionObject userIdentityToken,
   SignatureData userTokenSignature,
   StringCollection localeIds,
   byte[] serverNonce,
   out UserIdentityToken identityToken,
   out UserTokenPolicy userTokenPolicy
)