private void Button2_Click(object sender, System.EventArgs e)
{
CrystalReport1 test=new CrystalReport1();
ExportOptions exportOption=new ExportOptions();
DiskFileDestinationOptions diskOption=new DiskFileDestinationOptions();
exportOption=test.ExportOptions;
exportOption.ExportFormatType=ExportFormatType.PortableDocFormat;
exportOption.ExportDestinationType=ExportDestinationType.DiskFile;
diskOption.DiskFileName=@"C:\test.txt";
exportOption.DestinationOptions=diskOption;
test.Export();
}