C# code to read pdf file path

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using iTextSharp.text.pdf;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using PQScan.BarcodeScanner;
using Bytescout.BarCodeReader;
using System.Drawing;
using System.IO;
using System.Activities;
using System.ComponentModel;
using System.Threading.Tasks;

namespace Testing1
{
public class Readingbarcode : CodeActivity
{
[Category(“Input”)]
[RequiredArgument]
public InArgument FilePath { get; set; }

    [Category("Output")]
    public OutArgument<string> strResult { get; set; }

    protected override void Execute(CodeActivityContext context)
    {
        //PdfDocument pdf = new PdfDocument();
        string filPath = FilePath.Get(context);
        PdfReader pdfReader = new PdfReader(filPath);
        // int numberOfPages = pdfReader.NumberOfPages;

        Reader barcodeReader = new Reader();
        barcodeReader.BarcodeTypesToFind.Code39 = true;
        barcodeReader.Orientation = OrientationType.VerticalFromBottomToTop;
        FoundBarcode[] barcodes = barcodeReader.ReadFrom(filPath);
        int numberofBarcodes = barcodes.Count();
        List<string> barCodes = new List<string>();
        foreach (FoundBarcode barcode in barcodes)
        {
            int number = 1;
            number += barcode.Page;
            string holdBarcode = barcode.Value.Split('(')[0].ToString() + "," + number.ToString() + "\n";
            barCodes.Add(holdBarcode);  
        }
        string data = string.Join("", barCodes.ToArray());
        strResult.Set(context, data);

    }

}

}