public System.IO.Stream GetRDLCReportDefinition(string rdlFilename)
 
{
    //
    // Convert RDL file into RDLC file by removing some Query and Report _
      Parameters
    //
 
    ReportDefinition.ReportDefinitionDoc document = new _
      ReportDefinition.ReportDefinitionDoc();
 
    ReportDefinition.ReportType root = new ReportDefinition.ReportType( _
      document.Load(rdlFilename));
 
    for (int i = 0; i < root.GetDataSetsCount(); i++)
    {
        ReportDefinition.DataSetsType datasets = root.GetDataSetsAt(i);
 
        for (int d = 0; d < datasets.GetDataSetCount(); d++)
        {
            ReportDefinition.DataSetType dataset = datasets.GetDataSetAt(d);
 
            for (int q = 0; q < dataset.GetQueryCount(); q++)
            {
                ReportDefinition.QueryType query = dataset.GetQueryAt(q);
 
                for (int p = query.GetQueryParametersCount() - 1; p >= 0; p--)
                {
                    query.RemoveQueryParametersAt(p);
 
                }
            }
        }
    }
 
    for (int rp = root.GetReportParametersCount() - 1; rp >= 0; rp--)
    {
        root.RemoveReportParametersAt(rp);
 
    }
    System.Text.UTF8Encoding encoding = new System.Text.UTF8Encoding();
    byte[] buffer = encoding.GetBytes(document.SaveToString(root));
    return new MemoryStream(buffer);
}

Salzburger