It sound really complicated to me, and I can't imaging the code flow here, anyway you must never block UI thread.
I don't see why you would try to print a PictureBox, its purpose is to show an Image, surely it is the image that you would want to print? This is done with DrawImage method of...
Do you think it is wise to use this in UI thread?
No, my suggestion was that you use LoadCompleted event handler to signal your processing that you say need to wait for LoadCompleted to happen. It is your processing thread that needs to wait.
You shouldn't do any processing in UI thread that may take more than a split second, use a background thread for that. Use for example a AutoResetEvent to signal the worker thread that it can continue when LoadComplete happens.
I had no idea what dump valves was.
We do have roads! South-western part, the milder climate area of Norway, if one can call it that :) We don't see much snow unless we drive a couple of hours to the mountains during winter. The quattro drive is very nice when there is snow though.
Most of what you mentioned for the A4 is included in s-line I think, also including sporty bumpers and side skirts, leather sport seats, and a lowered and stiffer suspension, but excluding neon lights and high rise spoiler - that I'm far too old for anyway. Norway also has strict rules for car...
There are some earlier versions reports and workarounds about this that I've seen, but the latest two weeks ago recommends installing .Net Framework 4.8: Debugging Slow in Visual Studio 2019 - Developer Community
Yes, WriteBufferSize defaults to 2048 bytes, and default BaudRate 9600 bits means 1200 bytes can be transmitted per second. Compare that with your actual communication properties.