Image primaryImage = Image.FromFile(fileName);
Bitmap pImg = MakeGrayscale3((Bitmap)primaryImage);
using (ZBar.ImageScanner scanner = new ZBar.ImageScanner())
{
List<ZBar.Symbol> symbols = new List<ZBar.Symbol>();
System.Diagnostics.Stopwatch watch = new Stopwatch();
watch.Start();
symbols = scanner.Scan((Image)pImg);
watch.Stop();
TimeSpan timeSpan = watch.Elapsed;
MessageBox.Show("扫描执行时间：" + timeSpan.TotalMilliseconds.ToString());

if (symbols != null && symbols.Count > 0)
{
string result = string.Empty;
symbols.ForEach(s => result += "条码内容:" + s.Data + " 条码质量:" + s.Type + Environment.NewLine);
MessageBox.Show(result);
}
}(This is the code that c# identifies with ZBar, which I use to automatically generate Baidu translation just to download the code on the site)