How to scan, read multiple barcodes from image files using C# barcode reader library?

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            string inputFilePath = "C://Projects//Demo-Files//CODE39_1.png";

            BarCode[] datas = BarcodeReader.BarcodeReader.ReadBarcode(inputFilePath, BarcodeReader.BarcodeReader.CODE39);

            Trace.WriteLine("Total Code 39 barcodes found: " + datas.Length);

            foreach (BarCode barcodeData in datas)
            {
                string data = barcodeData.Data;

                Trace.WriteLine("Code 39 data: " + data);
            }

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        private static void ReadBarcodesInMultiThread()
        {
            String[] inputFilePaths = new String[] {
                "C://Projects//Demo-Files//CODE39_1.png",
                "C://Projects//Demo-Files//CODE39_2.png",
                "C://Projects//Demo-Files//CODE39_3.JPG",
                "C://Projects//Demo-Files//CODE39_87654321.jpg" };

            //  Combine all scan results.
            List<String> results = new List<String>();

            try
            {
                    //  Scan each file in a Task.
                System.Threading.Tasks.Task<String[]>[] tasks = new System.Threading.Tasks.Task<String[]>[inputFilePaths.Length];
                for (int i = 0; i < inputFilePaths.Length; i++)
                {
                        tasks[i] = new System.Threading.Tasks.Task<String[]>(
                            (args) => scanSingleFile((Object[])args), new Object[2] { inputFilePaths[i], BarcodeReader.BarcodeReader.CODE39 }
                            );
                        tasks[i].Start();
                }
                //  Wait for all Tasks done.
                System.Threading.Tasks.Task.WaitAll(tasks);

                
                foreach (System.Threading.Tasks.Task<String[]> task in tasks)
                {
                    results.AddRange(task.Result);
                }

             }
             catch (Exception)
             {
                Trace.WriteLine("Error in multi-thread barcode scanning!");
            }

            foreach (String data in results)
            {
                Trace.WriteLine("Code 39 data: " + data);
            }
        }

        private static String[] scanSingleFile(Object[] args)
        {
                try
                {
                    return BarcodeReader.BarcodeReader.read((String)args[0], (int)args[1]);
                }
                catch (Exception)
                {
                    return new String[0];
                }
        }