Scanning barcode using zXing

i need code for xamarine

using ZXing;
using ZXing.Common;
using ZXing.Mobile;
using System;
using System.Drawing;
using System.Windows.Forms;

namespace BarcodeScannerApp
{
    public partial class Form1 : Form
    {
        private MobileBarcodeScanner scanner;

        public Form1()
        {
            InitializeComponent();
            scanner = new MobileBarcodeScanner();
        }

        private void btnScan_Click(object sender, EventArgs e)
        {
            // Configure the scanner options
            var options = new MobileBarcodeScanningOptions
            {
                AutoRotate = false,
                TryHarder = true,
                PossibleFormats = new BarcodeFormat[] { BarcodeFormat.All_1D, BarcodeFormat.QR_CODE }
            };

            // Start scanning
            scanner.Scan(options).ContinueWith(t =>
            {
                if (t.Result != null && !string.IsNullOrWhiteSpace(t.Result.Text))
                {
                    // Barcode was successfully scanned
                    string scannedData = t.Result.Text;
                    MessageBox.Show("Scanned Barcode: " + scannedData);
                }
                else
                {
                    // Scanning was cancelled or failed
                    MessageBox.Show("Scanning was cancelled or failed.");
                }
            }, TaskScheduler.FromCurrentSynchronizationContext());
        }
    }
}