Chỉnh sửa và cập nhật chữ ký Qrcode được đặt trong tệp Ots

        
// Set up input Ots file
string filePath = "input.ots";

// Instantiate Signature for input file
using (GroupDocs.Signature.Signature signature = new GroupDocs.Signature.Signature(filePath))
{
        // Id of signature which is supposed to be updated
        // such Id might be got as a result of search operation
        string id = "eff64a14-dad9-47b0-88e5-2ee4e3604e71";

        // provide signature features to update
        // set up particular signature id
        QrCodeSignature signatureToUpdate = new QrCodeSignature(id)
        {
            // specify signature width
            Width = 200,
            // specify signature height
            Height = 200,
            // set left position
            Left = 120,
            // set top position
            Top = 160
        };

        // update signature
        bool updateResult = signature.Update(signatureToUpdate);

        // process updation result
        if (updateResult)
        {
            Console.WriteLine("Signature was updated successfully!");
        }
}