Program.cs

using IronBarCode;

namespace IronBarcode_Sample_Project
{
    class Program
    {
        static void Main(string[] args)
        {
            // Get a free license key instantly: https://ironsoftware.com/csharp/barcode/#trial-license
            IronBarCode.License.LicenseKey = "ENTER-KEY-HERE";

            // Creating a barcode is as simple as:
            var myBarcode = BarcodeWriter.CreateBarcode("12345", BarcodeWriterEncoding.EAN8);

            // And save our barcode as in image:
            myBarcode.SaveAsImage("EAN8.jpeg");
                                                           
            // Reading a barcode is easy with IronBarcode:
            var resultFromFile = BarcodeReader.Read(@"file/barcode.png"); // From a file
            var resultFromPdf = BarcodeReader.ReadPdf(@"file/mydocument.pdf"); // From PDF use ReadPdf

            // After creating a barcode, we may choose to resize and save which is easily done with:
            var myNewBarcode = BarcodeWriter.CreateBarcode("12345", BarcodeWriterEncoding.EAN8);
            myNewBarcode.ResizeTo(400, 100);
            myNewBarcode.SaveAsImage("myBarcodeResized.jpeg");
            
            // To set more options and optimization with your Barcode Reading,
            // Please utilize the BarcodeReaderOptions parameter of read:
            BarcodeReaderOptions myOptionsExample = new BarcodeReaderOptions()
            {
                // Choose a speed from: Faster, Balanced, Detailed, ExtremeDetail
                // There is a tradeoff in performance as more Detail is set
                Speed = ReadingSpeed.Balanced,
                // Reader will stop scanning once a barcode is found, unless set to true
                ExpectMultipleBarcodes = true,
                // By default, all barcode formats are scanned for.
                // Specifying one or more, performance will increase.
                ExpectBarcodeTypes = BarcodeEncoding.AllOneDimensional,
                // Utilizes multiple threads to reads barcodes from multiple images in parallel.
                Multithreaded = true,
                // Maximum threads for parallel. Default is 4
                MaxParallelThreads = 2,
                // The area of each image frame in which to scan for barcodes.
                // Will improve perfornace significantly and avoid unwanted results and avoid noisy parts of the image.
                CropArea = new System.Drawing.Rectangle(),
                // Special Setting for Code39 Barcodes.
                // If a Code39 barcode is detected. Try to use extended mode for the full ASCII Character Set
                UseCode39ExtendedMode = true
            };
            // And, apply:
            var results = BarcodeReader.Read("barcode.png", myOptionsExample);

        }
    }
}