I do recommend BarcodeLibrary
Here is a small piece of code of how to use it.
BarcodeLib.Barcode barcode = new BarcodeLib.Barcode()
{
IncludeLabel = true,
Alignment = AlignmentPositions.CENTER,
Width = 300,
Height = 100,
RotateFlipType = RotateFlipType.RotateNoneFlipNone,
BackColor = Color.White,
ForeColor = Color.Black,
};
Image img = barcode.Encode(TYPE.CODE128B, "123456789");