or
<telerik:ReportViewer ID="MyReportViewer" runat="server" Report="ReportLib.ReportCompteUS, ReportLib, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" Width="100%" Height="100%" ProgressText="Génération du rapport ..." > </telerik:ReportViewer><telerikReport:ReportViewer UseNativePrinting="False" Name="reportViewer" ReportServerUri="../ReportService.svc" />this.reportViewer.ReportServiceClientFactory = this;this.reportViewer.Report = "SilverFinancials.Report." + _reportCSName + ",SilverFinancials.Report, Version=1.0.0.0, Culture=neutral , PublicKeyToken=null";