C# รบกวนโค้ด Crystal Report save to PDF หน่อยครับ ......

//To generate PDF dynamically 

using System;
    using System.Windows.Forms;
    using CrystalDecisions.CrystalReports.Engine;
    using CrystalDecisions.Shared;

    namespace WindowsApplication1
    {
        public partial class Form1 : Form
        {
            ReportDocument cryRpt;

            public Form1()
            {
                InitializeComponent();
            }

            private void button1_Click(object sender, EventArgs e)
            {
                cryRpt = new ReportDocument();
                cryRpt.Load(PUT CRYSTAL REPORT PATH HERE\\CrystalReport1.rpt");
                crystalReportViewer1.ReportSource = cryRpt;
                crystalReportViewer1.Refresh(); 
            }

            private void button2_Click(object sender, EventArgs e)
            {
                try
                {
                    ExportOptions CrExportOptions ;
                    DiskFileDestinationOptions CrDiskFileDestinationOptions = new DiskFileDestinationOptions();
                    PdfRtfWordFormatOptions CrFormatTypeOptions = new PdfRtfWordFormatOptions();
                    CrDiskFileDestinationOptions.DiskFileName = "c:\\csharp.net-informations.pdf";
                    CrExportOptions = cryRpt.ExportOptions;
                    {
                        CrExportOptions.ExportDestinationType = ExportDestinationType.DiskFile;
                        CrExportOptions.ExportFormatType = ExportFormatType.PortableDocFormat;
                        CrExportOptions.DestinationOptions = CrDiskFileDestinationOptions;
                        CrExportOptions.FormatOptions = CrFormatTypeOptions;
                    }
                    cryRpt.Export();
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.ToString());
                }
            }
        }
    }