没用过2010...对“=>”用法不是很了解，麻烦高手帮我翻译下一段代码，不胜感激

readFan = (index) => {
   if (index < 2) {
      return superIO.Fans[index];
   }

  else

  {
    // get GPIO 80-87
    byte? gpio = superIO.ReadGPIO(7);
    if (!gpio.HasValue)
      return null;

    // read the last 3 fans based on GPIO 83-85
    int[] masks = { 0x05, 0x03, 0x06 };
    return (((gpio.Value >> 3) & 0x07) ==
       masks[index - 2]) ? superIO.Fans[2] : null;
  }
};

  int fanIndex = 0;
  postUpdate = () => {
     // get GPIO 80-87
     byte? gpio = superIO.ReadGPIO(7);
     if (!gpio.HasValue)
        return;

     // prepare the GPIO 83-85 for the next update
     int[] masks = { 0x05, 0x03, 0x06 };
     superIO.WriteGPIO(7,
         (byte)((gpio.Value & 0xC7) | (masks[fanIndex] << 3)));
     fanIndex = (fanIndex + 1) % 3;
};