匹配使用iTextSharp与Barcode.4NET生成的Code128A条形码时出现问题

using iTextSharp.text;
using iTextSharp.text.pdf;
using iTextSharp.text.pdf.Barcode;

public void GenerateCode128A_iTextSharp(string text)
{
    Document document = new Document();
    PdfWriter writer = PdfWriter.GetInstance(document, new FileStream("Code128A_iTextSharp.pdf", FileMode.Create));
    document.Open();

    Barcode128 code128 = new Barcode128(writer);
    code128.setCodeType(Barcode.CODE128A);
    code128.setCode(text);

    Image image = code128.CreateImageWithBarcode(writer, null, null);
    document.Add(image);

    document.Close();
}

using BarcodeLib;

public void GenerateCode128A_Barcode4NET(string text)
{
    using (Bitmap bitmap = new Barcode
    {
        Code = text,
        Encoding = BarcodeEncoding.CODE128A,
        Width = 300,
        Height = 150
    }.Render())
    {
        bitmap.Save("Code128A_Barcode4NET.png", System.Drawing.Imaging.ImageFormat.Png);
    }
}