I have a problem in my application.

In a windows form I receive and display data (packet of bytes) coming
from a RSR232 port (100 byte per second).
The problem: when I resize the form (a MDI child) I get a CRC error
for the incoming data, this means the byte packet was damaged!

Moreover I have remarked that the CPU use in task manager is around 10%
before resizing. But when I resize the form for the first time the CPU use
growes up to 99% and the indicator has this value till I close the
application. When I start again the application, the value is back to 10%!

Any suggestion?

Thank you very much for the help.