C# Get installed Printers list in windows application form

namespace : using System.Drawing.Printing

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Printing;
using System.Runtime.InteropServices;

namespace GetPrinterList
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            GetPrintersInstalled(true); // get insalled printer list and default printer datas
        }

        private void PrinterCbo_SelectedIndexChanged(object sender, EventArgs e)
        {
            ChangeDefaultPrinter(PrinterCbo.Text); //set as default printer
        }

        private void GetPrintersInstalled(bool isFirstTime)
        {

            try
            {
                PrintDocument printDoc = new PrintDocument();
                string defaultPrinterName = null;

                for (int i = 0; i < PrinterSettings.InstalledPrinters.Count; i++)
                {
                    if (isFirstTime)
                        PrinterCbo.Items.Add(PrinterSettings.InstalledPrinters[i]);

                    if (printDoc.PrinterSettings.IsDefaultPrinter)//get default printer at form loading event                    
                        defaultPrinterName = printDoc.PrinterSettings.PrinterName;
                }

                if (defaultPrinterName != null)
                {
                    PrinterCbo.Text = defaultPrinterName;
                    lblDefaultPrinter.Text = PrinterCbo.Text;
                    lblNoOfCopy.Text = printDoc.DefaultPageSettings.PrinterSettings.Copies.ToString();
                    lblPaperSize.Text = printDoc.DefaultPageSettings.PaperSize.PaperName.ToString();
                    lblResolution.Text = printDoc.DefaultPageSettings.PrinterResolution.ToString();
                    
                    if (printDoc.DefaultPageSettings.Landscape)
                        lblOrientation.Text = "LandScape";
                    else
                        lblOrientation.Text = "Portrait";
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }
        }

        // Change default printer
        [DllImport("Winspool.drv")]
        private static extern bool SetDefaultPrinter(string printerName);
        private void ChangeDefaultPrinter(string printerName)
        {
            if (printerName != null)
            {
                SetDefaultPrinter(printerName);
                GetPrintersInstalled(false);
            }
        }
    }
}

       

namespace : using System.Runtime.InteropServices

         // Change default printer
        [DllImport("Winspool.drv")]
        private static extern bool SetDefaultPrinter(string printerName);
        private void ChangeDefaultPrinter(string printerName)
        {
            if (printerName != null)
            {
                SetDefaultPrinter(printerName);
                GetPrintersInstalled(false);
            }
        }