eSigning - Barcode signature

In this post, we'll explore an eSigning API that allows to add barcode signature(s) within a document.
Supported Barcode Types

• Codabar
• Code128
• Code39Standard
• Interleaved2of5
• DutchKIX
• DotCode
• EAN8

Please have a look at this full list of supported barcode types.
To specify different options for Barcode signature, GroupDocs.Signature API provides BarcodeSignOptions class.
So, basically you have to specify Encode type and text. Please have a look at the following code snippet:

using (Signature signature = new Signature("sample.pdf"))
{
    BarcodeSignOptions options = new BarcodeSignOptions("JohnSmith")
    {
        // setup Barcode encoding type
        EncodeType = BarcodeTypes.Code128,
        // set signature position
        Left = 100,
        Top = 100
    };
    signature.Sign("SampleSigned.pdf", options);
}

This is how output will look like and you can get the encoded information just by scanning the Barcode.