Public Overridable Function QueryFirst( _
   ByVal requestHeader As RequestHeader, _
   ByVal view As ViewDescription, _
   ByVal nodeTypes As NodeTypeDescriptionCollection, _
   ByVal filter As ContentFilter, _
   ByVal maxDataSetsToReturn As UInteger, _
   ByVal maxReferencesToReturn As UInteger, _
   ByRef queryDataSets As QueryDataSetCollection, _
   ByRef continuationPoint As Byte(), _
   ByRef parsingResults As ParsingResultCollection, _
   ByRef diagnosticInfos As DiagnosticInfoCollection, _
   ByRef filterResult As ContentFilterResult _
) As ResponseHeader

public virtual ResponseHeader QueryFirst( 
   RequestHeader requestHeader,
   ViewDescription view,
   NodeTypeDescriptionCollection nodeTypes,
   ContentFilter filter,
   uint maxDataSetsToReturn,
   uint maxReferencesToReturn,
   out QueryDataSetCollection queryDataSets,
   out byte[] continuationPoint,
   out ParsingResultCollection parsingResults,
   out DiagnosticInfoCollection diagnosticInfos,
   out ContentFilterResult filterResult
)