protected void transfer_Click(object sender, EventArgs e)
        {
            string sellerId        = Session["sellerId"].ToString();
            Bitmap uploadedFPImage = new Bitmap(FPFU.PostedFile.InputStream);

            byte[] data;
            using (MemoryStream stream = new MemoryStream())
            {
                uploadedFPImage.Save(stream, System.Drawing.Imaging.ImageFormat.Png);
                data = stream.ToArray();
            }


            BsonDocument doc = operations.findByFingerprint(data);

            if (doc != null)
            {
                double transferAmount = Convert.ToDouble(Cost_txtbox.Text);
                operations.newTransaction(sellerId, doc["pilgrimId"].AsString, transferAmount);


                testCompare.Text = "Transaction completed successfully";
            }
            else
            {
                testCompare.Text = "There is no pilgrim with this fingerprint!";
            }
        }