Public Overridable Function ActivateSession( _
   ByVal requestHeader As RequestHeader, _
   ByVal clientSignature As SignatureData, _
   ByVal clientSoftwareCertificates As SignedSoftwareCertificateCollection, _
   ByVal localeIds As StringCollection, _
   ByVal userIdentityToken As ExtensionObject, _
   ByVal userTokenSignature As SignatureData, _
   ByRef serverNonce As Byte(), _
   ByRef results As StatusCodeCollection, _
   ByRef diagnosticInfos As DiagnosticInfoCollection _
) As ResponseHeader

public virtual ResponseHeader ActivateSession( 
   RequestHeader requestHeader,
   SignatureData clientSignature,
   SignedSoftwareCertificateCollection clientSoftwareCertificates,
   StringCollection localeIds,
   ExtensionObject userIdentityToken,
   SignatureData userTokenSignature,
   out byte[] serverNonce,
   out StatusCodeCollection results,
   out DiagnosticInfoCollection diagnosticInfos
)