private static List<ReportObject> GetAllReportObjects(ReportClass crReportDocument, List<ReportDocument> listReportDocumentsToCloseAndDispose)

{

    List<ReportObject> listAllReportObjects = new List<ReportObject>();            



    Queue<ReportDefinition> queueReportDefinitions = new Queue<ReportDefinition>();

    queueReportDefinitions.Enqueue(crReportDocument.ReportDefinition);            



    while (queueReportDefinitions.Any())

    {

        ReportDefinition reportDefinition = queueReportDefinitions.Dequeue();



        foreach (ReportObject reportObject in reportDefinition.ReportObjects)

        {

            if (reportObject.Kind == ReportObjectKind.SubreportObject)

            {

                SubreportObject subreportObject = (SubreportObject)reportObject;

                ReportDocument rdSubReport = subreportObject.OpenSubreport(subreportObject.SubreportName);                        

                queueReportDefinitions.Enqueue(rdSubReport.ReportDefinition);

                listReportDocumentsToCloseAndDispose.Add(rdSubReport);

            }

            else

                listAllReportObjects.Add(reportObject);

        }

    }

    return listAllReportObjects;

}

List<ReportDocument> listReportDocumentsToCloseAndDispose = new List<ReportDocument>();

List<ReportObject> listAllReportObjects = GetAllReportObjects(crReportDocument, listReportDocumentsToCloseAndDispose);



foreach (ReportObject reportObject in listAllReportObjects)

   CustomizeReportObject(reportObject);



foreach (ReportDocument reportDocument in listReportDocumentsToCloseAndDispose)

{

    reportDocument.Close();

    reportDocument.Dispose();

}