private void CmdGenerate_Click(object sender, EventArgs e)
        {
            //Research
            // http://www.identisource.net/26_bit_format_layout.cfm
            // http://stackoverflow.com/questions/30919535/determine-facility-code-and-card-number-from-atr-in-c-sharp

            RTxtResult.Clear();
            RTxtResult.AppendText(HexResult(Convert.ToInt32(TxtFacilityCode.Text), Convert.ToInt32(TxtCardCode.Text)));
        }
        private void CmdBulkGen_Click(object sender, EventArgs e)
        {
            string[] delimiterChars = { "\r\n" };
            string[] rows;
            rows = TxtBulkCardCode.Text.Split(delimiterChars, StringSplitOptions.RemoveEmptyEntries);
            RTxtResult.Clear();

            foreach (string s in rows)
            {
                try
                {
                    RTxtResult.AppendText(HexResult(Convert.ToInt32(TxtFacilityCode.Text), Convert.ToInt32(s)) + "\r\n");
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
            }
        }
 private void CmdConvertHex_Click(object sender, EventArgs e)
 {
     try
     {
         //FromByteArray(hexString, int byteOffset, int bitOffset, int numberOfBits)
         //var cardNumber = FromByteArray(atrByteArray, 0, 1, 16);
         //var facilityCode = FromByteArray(atrByteArray, 0, 17, 8);
         RTxtResult.Clear();
         var   hexString    = TxtConvertHex.Text;
         var   start_number = Int64.Parse(hexString, NumberStyles.HexNumber);
         Int64 a_26_only    = start_number & 0x3FFFFFF; //26 bits, 11 1111 1111 1111 1111 1111 1111
         //Int64 result = (a_26_only >> bitOffset) & (long)(Math.Pow(2,numberOfBits)-1);
         RTxtResult.AppendText("Card Number:" + ((a_26_only >> 1) & (long)(Math.Pow(2, 16) - 1)).ToString() + "\r\n");
         RTxtResult.AppendText("Facility Code:" + ((a_26_only >> 17) & (long)(Math.Pow(2, 8) - 1)).ToString() + "\r\n");
     }
     catch (Exception ex)
     {
         MessageBox.Show(ex.Message);
     }
 }