Should synchronization lock be added to synchronous sending and receiving for multi-thread safety?

[hhj156hhj]

Should synchronization lock be added to synchronous sending and receiving for multi-thread safety?

[hhj156hhj]

 protected override Span<byte> TransceiveFrame(byte unitIdentifier, ModbusFunctionCode functionCode, Action<ExtendedBinaryWriter> extendFrame)
 {
     // WARNING: IF YOU EDIT THIS METHOD, REFLECT ALL CHANGES ALSO IN TransceiveFrameAsync!
    _lock (_frameBuffer)_
     {
         ushort bytesFollowing = 0;

         var frameBuffer = _frameBuffer;

[Apollo3zehn]

For a thread-safe client you would need some kind of synchronization, yes