how to genereate crystal reports?

using CrystalDecisions.CrystalReports.Engine;

using CrystalDecisions.Shared;
Code:

ReportDocument cryRpt = new ReportDocument();

        ExportOptions rptExportOption;

        DiskFileDestinationOptions rptFileDestOption = new DiskFileDestinationOptions();

        PdfRtfWordFormatOptions rptFormatOption = new PdfRtfWordFormatOptions();

        cryRpt.Load(@"D:\Muthu\Tech\Blogs\ListView\CrystalReport2.rpt");

        string reportFileName = string.Empty;

        reportFileName = @"D:\Muthu\Projects\WebApplication1\WebApplication1\Report.pdf";

        rptFileDestOption.DiskFileName = reportFileName;

        rptExportOption = cryRpt.ExportOptions;

        {

            rptExportOption.ExportDestinationType = ExportDestinationType.DiskFile;

//ExportFormatType.PortableDocFormat (U can change the file type here.)

            rptExportOption.ExportFormatType = ExportFormatType.PortableDocFormat;

            rptExportOption.ExportDestinationOptions = rptFileDestOption;

            rptExportOption.ExportFormatOptions = rptFormatOption;

        }

        cryRpt.Export();