Serial.Start C# (CSharp) Method

    void Start()
    {
        // print ("Serial Start ");
    }

 public IMU440(string port, int baudrate, log loger, bool debug = false)
 {
     lg                 = loger;
     nav                = new Serial(port, baudrate);
     this.debug         = debug;
     nav.PackageMode    = Serial.PackageModes.UseFunction;
     nav.EscapeToken    = new byte[0];
     nav.FindPackageEnd = (bytes =>
     {
         int offset = 0;
         for (int i = 0; i < bytes.Length - 1; i++)
         {
             if (bytes[i] == 0x55 && bytes[i + 1] == 0x55)
             {
                 offset = i;
             }
         }
         if (bytes.Length >= 5 && bytes[offset] == 0x55 && bytes[offset + 1] == 0x55)
         {
             if (bytes.Length > offset + 4 &&
                 bytes.Length >= (offset + 7 + bytes[offset + 4]))
             {
                 return(offset + 7 + bytes[offset + 4]);
             }
         }
         return(-1);
     });
     nav.PackageReceived = navCallback;
     nav.Start();
 }