I’m getting “Buffer OVFLW” on my screen and i believe it’s due to serial board data read.
I’m using FEZ Raptor with GHI RS232 gadgeteer. I believe similar report on the buffer overflow of RS232 is also reported on codeplex - https://netmf.codeplex.com/workitem/2226
I am a strong believer in handling serial data like an interrupt. Don’t try to process it at all, get it out and stuff it into a queue you can manage outside the incoming data handler. Certainly keep away from strings and stay in byte arrays as long as possible as well !