Нежелательное обнуление счётчика в цикле при достижении значений 4077, 8157. Последовательный порт. Метод Read()

int count = serialPort1.BytesToRead;
byte[] byteArray = new byte[count];
serialPort1.Read(byteArray, 0, count);
for (int i = 0; i <= count-3; i = i + 3) {}

// В переменной received будет храниться фактически записанное количество байтов в byteArray.
// received <= count
int received = serialPort1.Read(byteArray, 0, count);

byte[] buffer = new byte[1024];
serialPort1.Read(buffer, 0, buffer.Length);

byte[] buffer = new byte[1024];
int received = 0;
while (received < buffer.Length)
   received += serialPort1.Read(buffer, received, buffer.Length - received);

byte[] byteArray = new byte[1024[;
int received = 0;
while (received < bytesArray.Lenght)
{
  received += serialPort1.Read(byteArray, received, byteArray - received);
  richTextBox1.AppendTaxt(BitConverter.ToString(byteArray));
  richTexrBox2.AppendText(received.ToString() + " ");
}

private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
  byte[] byteArray = new byte[1024];
  int received = 0;
  while (received < bytesArray.Lenght)
  {
    received += serialPort1.Read(byteArray, received, byteArray - received);
    richTextBox1.AppendText(BitConverter.ToString(byteArray));
    richTexrBox2.AppendText(received.ToString() + " ");
  }
}

byte[] buffer = new byte[3];
int dataCount = 0;
private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
  int received = 0;
  while (received < buffer.Lenght)
    received += serialPort1.Read(buffer, received, buffer.Length - received);
  dataCount++;
}

received += serialPort1.Read(buffer, received, buffer.Length - received);

byte[] buffer = new byte[3];
int dataCount = 0;
private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
//Использую данный метод, так как не знаю точной длины посылки
int count = serialPort1.BytesToRead;
byte[] byteArray = new byte[count];
serialPort1.Read(byteArray, 0, count);
for (int i = 0; i <= count-3; i = i + 3) 
{
  int firstByte, secondByte, thirdByte;
  firstByte = byteArray[i];
  secondByte = byteArray[i + 1];
  thirdByte = byteArray[i + 2];
  //Эти три байта должны быть определенного вида
  //Если условия не выполняются (повреждение байта), происходит смещения на байт
  if (firstByte == 12)
  {
    int result1, result2, result3;
    result1 = firstByte * 10;  
    result2 = secondByte * 20;  
    result3 = thirdByte * 30;  
    textBox1.AppendText(dataCount.ToString() + " " + result1.ToString() + " " + result2.ToString() + " " + result3.ToString() + "\r\n");
  }
  else
  {
    i = i + 1;
    textBox1.AppendText("Смещение на один байт" + "\r\n");
  }
  //Ваш код
  int received = 0;
  while (received < buffer.Lenght)
    received += serialPort1.Read(buffer, received, buffer.Length - received);
  dataCount++;
  }
}