Print to printer event in C# is not working in crystal report viewer form

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CrystalReports

data

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Hello Guys, my problem is i want to print my report directly on form load but when i open my form so it's close automatically there is data in crystal report but it's not printing and form is close automatically i dont know why please tell me where i am wrong and one thing more i dont about

CrystalDecisions.CrystalReports.Engine.ReportDocument();
            rptDoc.Load(reportPath); i mean i dont know which path i need to put here please also suggest me this 

Thanks,

What I have tried:

<pre>private void PrintToPrinter()
        {
            PrintReport(System.Windows.Forms.Application.StartupPath + "\\CrystalReport1.rpt",
                "Send To OneNote 2013");
        }
        private void PrintReport(string reportPath, string PrinterName)
        {
            CrystalDecisions.CrystalReports.Engine.ReportDocument rptDoc =
                                new CrystalDecisions.CrystalReports.Engine.ReportDocument();
            rptDoc.Load(reportPath);

            CrystalDecisions.Shared.PageMargins objPageMargins;
            objPageMargins = rptDoc.PrintOptions.PageMargins;
            objPageMargins.bottomMargin = 100;
            objPageMargins.leftMargin = 100;
            objPageMargins.rightMargin = 100;
            objPageMargins.topMargin = 100;
            rptDoc.PrintOptions.ApplyPageMargins(objPageMargins);
            rptDoc.PrintOptions.PrinterName = "Microsoft XPS Document Writer";
            rptDoc.PrintToPrinter(1, false, 0, 0);
        }