Is it necessary to synchronize .NET SerialPort writes/reads?

Question

In my application I use the .NET SerialPort class for reading and writing data. The reading is done using the DataReceived event, I assume internally on a ThreadPool thread.

Answer 1

From the documentation:

Any public static (Shared in Visual Basic) members of this type (SerialPort) are thread safe. Any instance members are not guaranteed to be thread safe.

So you should definetly synchronize your read/writes with locks.