C#

string valueString = string.Empty;
          //List<byte> AtronBytes First 39 bytes = header
          int length = AtronBytes.Count - 39;
          for (int i = 0; i < length; i += 8) // length = 1176
          {
              int colNum;
              if (i == 0) colNum = 1;
              else colNum = i / 8 + 1;
              string column = machineDataColumnNames[colNum];
              //tempAtronBytes = copy of AtronBytes
              byte[] valueByte = tempAtronBytes.GetRange(0, 8).ToArray();
              // last byte of valueByte = checksum
              byte chkVal = Extentions.CalculateOpdrChecksum(tempAtronBytes.GetRange(0, 7).ToArray()); // 1ms
              if (chkVal == tempAtronBytes[7])// checksum test
              {
                  valueString = Encoding.ASCII.GetString(
                                tempAtronBytes.GetRange(0, 7).ToArray()).Trim();
                  // Remove value bytes and checksum:
                  tempAtronBytes.RemoveRange(0, 8);

                  SqlCeExtentions.ZakdataDatabase_Update(column, valueString, opdrString); // 87ms
                  // add to stringBuilder:
                  logAppend(column.PadRight(30), valueString);
                  //Show in richTextbox
                  if (colNum > 146)
                  {
                      logResult();
                  }
              }
              else
              {
                  MessageBox.Show("Checksum error");
                  return;
              }
          }