Setting PrinterSettings.PrinterName leads to printing of junk value on print of crystal report

Hi,
I am trying to print a crystal report in WPF C# by sending it directly to printer without a viewer .The user can select different printers based on a drop down .However when i try to set PrinterSettings.PrinterName="PrinterName" ,the printer is printing junk values.I am using VS2017,WPF ,OS-Windows 10,.NET Framework-4.7.2,

CrystalDecisions.CrystalReports.Engine-13.0.2000.0

CrystalDecisions.Shared-13.0.2000.0

My code is

    ReportDocument ObjDoc = new ReportDocument();
    System.Drawing.Printing.PrintDocument pDoc = new System.Drawing.Printing.PrintDocument();
    CrystalDecisions.Shared.PrintLayoutSettings PrintLayout = new CrystalDecisions.Shared.PrintLayoutSettings();
    System.Drawing.Printing.PrinterSettings printerSettings = new System.Drawing.Printing.PrinterSettings();
    System.Drawing.Printing.PageSettings pSettings = new System.Drawing.Printing.PageSettings(printerSettings);
    System.Drawing.Printing.PageSettings pageSettings = new System.Drawing.Printing.PageSettings(printerSettings);
    //Fetch Values in dataset cdtUTDocEng
      ObjDoc.Load("//ServerName//Crystal_Reports//VHRSSALEFDE002.rpt");
                                    if (cdtUTDocEng.Rows.Count > 0)
                                        ObjDoc.SetDataSource(cdtUTDocEng);
                                    else
                                    {
                                        lsPrintMessage = "Printing Failed -Failed to fetch Undertaking English details";
                                        break;
                                    }


                                    if (cEnvironment.Production == psEnvironment)
                                    {
                                        
                                        ObjDoc.PrintOptions.PrinterDuplex = PrinterDuplex.Default;
                                        lsPrinterName = cmbPrinter.SelectedValue.ToString().Trim();
                                        if (CheckifPrinterInstalled(cmbPrinter.SelectedValue.ToString().Trim()) == true)
                                        {
                                            
                                            
    System.Drawing.Printing.PrinterSettings.PrinterName =cmbPrinter.SelectedValue.ToString().Trim();
                                            ObjDoc.PrintToPrinter(printerSettings, pSettings, false, PrintLayout);
                                            ObjDoc.Dispose();

                                           
 lsPrintMessage = lsPrintMessage + "Full documentation English " + 
pdtPrintDetails.Rows[lirow]["COPY_TYPE"].ToString().Trim() + " has been 
sent to printer " + cmbPrinter.SelectedValue.ToString().Trim() + 
Environment.NewLine;
                                        }
                                        else
                                           
 lsPrintMessage = "This printer " + 
cmbPrinter.SelectedValue.ToString().Trim() + " is not installed on 
server,cannot print";
                                    }

This line causes the issues

    System.Drawing.Printing.PrinterSettings.PrinterName =cmbPrinter.SelectedValue.ToString().Trim();

If i remove this line,the printer prints to my default printer and print comes correctly

I tried various combinations of setting printer name with the below values,all print junk values

       1)printerSettings.PrinterName= "Dyna_Offshore";
       2)pSettings.PrinterSettings.PrinterName= "Dyna_Offshore";
       3)System.Drawing.Printing.PrinterSettings.PrinterName = "\\\\My PC IP\\Dyna_Offshore";

I tried setting printer name on report document like this ,but the code ignores this setting and takes PrinterName from printerSettings

1)ObjDoc.PrintOptions.PrinterName= "Dyna_Offshore";