local ReportViewer Databse

LinqNewDataContext db = new LinqNewDataContext();
var query = from c in db.tbl_Temperatures
                    where c.Device_Id == "Tlog1"
                    select c;
var datasource = new ReportDataSource("DataSet1", query.ToList());
ReportViewer1.Visible = true;
ReportViewer1.ProcessingMode = ProcessingMode.Local;
ReportViewer1.LocalReport.ReportPath = @"Report6.rdlc";    
ReportViewer1.LocalReport.DataSources.Clear();
ReportViewer1.LocalReport.DataSources.Add(datasource);
ReportViewer1.LocalReport.Refresh();